Digital Marketing 101: How to Define KPIs

How to track your digital marketing success.

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If you’re looking to get hired in tech as a digital marketer, there are dozens of niches for you to choose from, from SEO marketing to content marketing to marketing automation, and beyond. No matter where you end up, you’ll need to know how to keep track of your progress and use numbers to demonstrate your results. That’s where digital marketing KPIs (key performance indicators) come in.

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What are Marketing KPIs?

KPIs, or key performance indicators, are quantitative benchmarks you set to track how much progress you’re making towards your marketing goals. To put it simply, a KPI is a metric you aim to hit to guarantee your project or department is on track, growing, and adding to the company’s bottom line.

The best KPIs follow the SMART framework, a system often used in management consulting. KPIs should be:


Let’s say you want to hit 20,000 Instagram followers on your company account. To convert that to a SMART KPI, here’s the context you’d need to think about:

In order to influence Instagram sales (relevant), I want to grow my company’s Instagram following (specific) from 10k to 20k (measurable) this quarter (time-bound), using a social media agency (achievable).

As another example, let’s say you want to get more website traffic. To make this KPI smart, you’d break it down like this:

I want more people to visit our website and become customers (relevant), so this month (time-bound), I want to boost our organic search traffic (specific) from 70,000 visitors per month to 80,000 visitors per month (measurable), which I’ll do primarily through link-building and improved keyword ranking (achievable).

In practice, you’d probably list these KPIs on a spreadsheet like this:

  • 20,000 Instagram followers
  • 80,000 site visits from organic search traffic

But! It’s important to have research and a plan behind the numbers if you want them to happen.

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How to Pick the Best KPIs for Your Brand

So, what KPIs should you track? There is a seemingly infinite number of KPIs, and it can be easy to end up tracking everything and learning nothing.

Often, teams will overcompensate for a previous lack of data by building out an epic spreadsheet, replete with bells, whistles, and more KPIs than you can shake a stick at…only to realize it’s too time-consuming to keep updated, and too overwhelming to learn from.

Instead, it’s a best practice to focus on only the KPIs that are actually relevant to your company, your team, and your current projects. To narrow it down, try using questions like these:

If I had to focus on just one thing, what would it be?

Sample answers:

  • More people on our email list (new leads)
  • More sales (conversions or revenue)
  • More people clicking on my emails (click-through-rate)

What numbers do I need to know about to have context?

Using the examples above, here are a few contextual KPIs that can help you get more insight into your most important numbers:

New leads: You don’t just want any new leads, you want the right ones. So, you may also want to track how many of those new leads are likely to purchase your product (marketing qualified leads) and whether those leads stick around (churn rate).

Sales: Sales are great, but you want to make sure those new customers stick around (churn rate). And, you probably want to know how much these sales earn your company over time (customer lifetime value).

Email click-through-rate: In addition to boosting the proportion of people who open your emails, you want to get more people on your email list in the first place (list size), and you’ll also want to up the number of people opening your emails (open rate).

Using this logic, you can build out a list of related KPIs that will help you get a read on the progress you’re making—without burdening yourself with extraneous numbers that don’t help you make decisions.

Is this metric important to the business? (Or just a vanity metric?)

When you’re tracking a number that makes you feel good but doesn’t do anything for the business, that’s a vanity metric.

Try to figure out if the metric you’re looking at actually drives the business forward. It’s easy to get caught up on things like website traffic or email list size, but those metrics are only important if they contribute to business growth.

Am I doing anything to impact this metric?

One reason marketers feel analytics overload when looking at a huge list of KPIs is the fact that, in reality, they’re not actually doing much to affect the vast majority of those numbers. Think about it. As a single digital marketer, and even as a marketing team, there’s only so much you can focus on at one time.

Try tracking only the KPIs you’re actively trying to influence. For example, if you’d love to grow your email list, but aren’t planning projects to make it happen, it might not truly be one of your KPIs. If, on the other hand, it is important, use your KPIs to help you decide what to focus on. If it’s a KPI, it should be a current priority.

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How to Track Marketing KPIs

The simplest way to track your KPIs is to set up a spreadsheet in Excel or Google Sheets and manually add the numbers at the same time each week using sources like Google Analytics and other marketing tools, such as your email marketing platform or social media manager.

You can also pay a virtual assistant to pull data, so you don’t have to spend time gathering the numbers. Or, you can work with your tech team to set up an automated dashboard that grabs the numbers on autopilot.

You’ll need to decide how often to track each KPI. Here are a few good rules of thumb:

  1. Track KPIs weekly when they are very important to the business, and you can change the strategy week-to-week in response to the numbers.
  2. Track KPIs monthly when you can alter your monthly strategy to affect these numbers, and when you need to see a percent growth month-over-month (often due to investors).
  3. Track KPIs quarterly when you need to wait a few months to see if your strategy is working.

A few examples:

Each week, you can tweak your strategy to try to get more leads in the door. It makes sense to track new leads week-over-week, since you can adjust course quickly to use what you learn.

If you want to increase time-on-page, it’s smart to look at this number monthly. Many variables (like an unusually popular post) could skew the numbers in the short-term and throw you off if you look at it too closely every week.

Many SEO strategies take several months to play out. You’ll get more out of tracking these quarterly than weekly.

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Which KPIs should you track?

Time for the nitty-gritty. Which KPIs should you consider tracking at your company and on your team? First, let’s talk about a KPI that is relevant no matter what digital marketing job you have:


Return on investment, or ROI, is one of the most important KPIs for any marketing. In short, ROI asks the question: Is my marketing team “worth it” to the company? Does my marketing team earn enough for the company to offset the cost of the team and our day-to-day operations?

To calculate ROI, you’ll need to estimate the cost of your marketing efforts, including salaries, fees, and hourly rates, plus the costs associated with marketing tools, platforms and services. To be sure of your value to the company, you’ll want to make sure your team adds more revenue each month than it costs.

Now, at some venture-backed companies, or in niches where revenue comes in through other avenues, you may not be required to prove your ROI. But keeping an eye on ROI is a smart way to keep your team lean and earn the respect of your superiors, who will appreciate you focusing on the bottom line.

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The Best KPIs for Social Media


The number of people who saw your social media posts.


How many times your content was displayed (even if a user didn’t end up seeing it).


How many people subscribed to your account.

Even if follower count can become a vanity metric in isolation, the size of your following is still important, as long as you’re getting the right kinds of followers, and looking at other metrics, too (such as reach and comments).

Active followers

The number of followers who are actually engaging with your content on a regular basis.


The number of people who like, thumbs up, or heart a post.

It’s smart to aim for a 10% like-to-follower rate. So, if you have 1,000 followers on Instagram, you can aim for 100 likes per post.


The total number of comments on a post.

Aim for 1–2% comment-to-like rate when you’re starting out. If your post got 2,000 likes, look for 20–40 comments.


How many people click a link on your social media post or profile and leave the platform.

Traffic, leads, and conversions

The number of people who visit your site, provide their email address or purchase after clicking a link on your social media post or profile.


The number of times your post was shared by another user on the platform.

Mentions or Share of Voice

How many people are talking about your brand.

Here’s a good resource for calculating share of voice on social media.

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The Best KPIs for SEO

Total website traffic

The total amount of times someone visits your site within a given time period.

Organic search traffic

The total amount of times someone visits your site within a given time period because they entered a search term in a web browser and found your site in the results.


The number of times someone visited your site and stayed there (even if they clicked around between pages) within a 30-minute window.


The number of times pages were viewed on your site (even if they were viewed multiple times by the same visitor).


The number of unique visitors who came to your site.

Keyword Ranking

This refers to how well your page stacks up when someone types a specific keyword or keyword string into a search engine. In other words, how far up on a search engine results page (SERP) does your page end up? You’ll aim for a position on the first page.

Links Built

The number of times other sites link to your page. These are also called linkbacks, or inbound links.

Domain authority / page authority

A score (0–100) that tells you how well your site will rank in SERPs (search engine results pages).

DA was developed by Moz, and depends on things like the number of inbound links to your site. You can also get a score for a single page on your site, or page authority.

Total website conversion rate

The overarching conversion rate of your whole site. You can compare site visits to conversions/purchases, or look at this in a way that makes the most sense for your company.

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The Best KPIs for Email Marketing

List size

The number of people subscribed to your email list.

Delivery rate

The percent of emails that were actually delivered.

This number can be affected by things like issues with the email server.

Email open rate

The percent of people who open your emails out of the total number of emails delivered.

Click-through-rate (CTR)

The percent of clicks on a link in an email compared to the number of emails opened or delivered.

Conversion rate

The number of people who “convert” (typically, this means they became a customer or made a purchase) after clicking a link in an email.

Unsubscribe rate

The rate at which people on your email list are unsubscribing. You can have an unsubscribe rate for just one email, or look at the rate across all the emails you send.

A high unsubscribe rate can indicate you’re sending too many emails, or your subscribers are not interested in the content you’re sending.

Marked as spam rate

The rate at which your email is automatically marked as spam (by email platforms like Google) or manually marked as spam by your subscribers.

A high spam rate is a sign your emails are being interpreted as overly sales-y, or there are other problems with deliverability.

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The Best KPIs for Content Marketing

New leads

Email addresses added to your email list for the first time. You can also track the conversion rate of total traffic to new leads.

MQLs, or marketing qualified leads

To gauge if you’re bringing in “good” leads who are likely to become customers, track MQLs.

You can set up a system for lead scoring using platforms like Hubspot (or manually, by ranking leads based on actions they’ve taken, like downloading a certain white paper or visiting the site a certain amount of times).

Organic traffic

Website traffic generated by paid advertising is considered “paid traffic,” while visitors who found your site by entering a keyword into a search engine are “organic.” Creating high-quality, SEO-optimized content should boost organic traffic.

Downloads or opt-ins

The number of times visitors entered their email to receive a freebie, whether that’s a downloadable PDF, access to a webinar, or membership to a list. This number is different than new leads, since a single lead can convert on multiple opt-ins.

Time on page

The amount of time the average visitor stays on your page. Typically, you want to create content that keeps visitors on your site longer.

Pages per session

The number of pages the average visitor views per 30-minute session. This indicates how “binge-able” your content is, and how many pages can hold your visitors’ attention.

Bounce rate

The rate at which visitors arrive on your page and immediately leave. A high bounce rate is a sign the page isn’t what visitors are expecting.

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Total spend

The dollar amount you spent on paid ads.


The number of times your ad was displayed.


The total number of times someone clicked your ad.

CPC, or cost per click

The dollar amount you pay each time someone clicks your ad. In a well-targeted campaign that’s resonating with an audience, this number will go down.

CAC, or customer acquisition cost

This number compares the dollar amount a customer pays you with the price of acquiring the customer.

LTV, or lifetime value

The average dollar value of a single customer, taking into account how long they remain customers and how many purchases they make. LTV is a valuable metric because CAC doesn’t account for everything (what happens if a customer makes another purchase a few months later?).

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The Best KPIs for Sponsored Content and Partnerships

New leads

The number of new leads you acquire as a result of a partnership with another company, an influencer, or a brand sponsorship.

Customer conversion rate

The percent of new leads from a sponsorship or partnership that become customers.

Churn rate

The percent of customers associated with a campaign who get refunds (churn rate is the opposite of retention rate).

Referral traffic

Traffic to your website that came from (or was referred by) a partnership or sponsorship.

CAC, or customer acquisition cost

This number compares the dollar amount a customer pays you with the price of acquiring the customer through a partnership or sponsorship.

LTV, or lifetime value

The lifetime value of customers associated with partnerships or sponsorships.

All these KPIs can feel like a lot to swallow. That’s why it’s important to narrow in on the right KPIs for your company and your team. Don’t worry about tracking them all, but use this list to choose the KPIs that make sense for you. And if we missed any of your favorite KPIs, let us know in the comments below!

Do you want to learn more about effectively tracking digital marketing KPIs? Skillcrush’s Beginner Digital Marketing Blueprint and Advanced Digital Marketing Blueprint walk you through the basics of tracking the right metrics as a digital marketer, plus lots more. Learn more here.

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Cameron Chapman

Cameron is a staff writer here at Skillcrush, and spends most of her time writing and editing blog posts and Ultimate Guides. She's been a freelance writer, editor, and author for going on a decade, writing for some of the world's leading web design and tech blogs. When she's not writing about design, she spends her time writing screenplays and making films (and music videos for rock and metal bands!) in Vermont's Northeast Kingdom.