What you spent to drive one meaningful onsite action. Filters out generic clicks and nav-menu noise to price only the actions that signal real intent.

The first-time users who took a real consideration action: pricing page visit, comparison tool use, calculator completion. The new entries into your funnel, not the same people churning through.

Sessions arriving from unpaid search. The compounding asset of content and SEO investment: rankings you earned once keep delivering visitors while paid channels stop the moment you stop paying.

Distinct people who visited in the period, as distinct from the sessions they generated. The denominator that keeps reach honest: one obsessed visitor can generate fifty sessions and still be one person.

The share of visits to a page that end there. Unlike bounce rate, exits count people who browsed first. High exits on checkout pages are emergencies; on thank-you pages they are the plan.

The share of sends that never reached an inbox. Hard bounces are dead addresses; soft bounces are temporary. Left unmanaged, both erode your sender reputation and drag down every future campaign.

Visits to your site or app, bundled into periods of activity. The base unit of GA4 measurement and the denominator behind most engagement metrics. Volume without quality context flatters every report.

Sessions lasting over ten seconds, converting, or viewing multiple pages. GA4's native quality filter and the foundation of Quality Sessions: it separates genuine visits from accidental taps and instant exits.

What each like, comment, share or click costs you. The efficiency check on social spend: cheap engagement from the wrong audience is more expensive than it looks.

How far down the page visitors actually travel. The honesty check on long-form content: your carefully crafted conclusion is invisible if most readers left at the second paragraph.

The share of visitors who actually did the thing you brought them to your site to do: buy, sign up, book, subscribe. The headline number on whether your funnel is doing its job.

The revenue attributable to your digital marketing activity. The outcome every other metric in the funnel is ultimately trying to produce.

How much the average customer spends in a single transaction. The quiet compounding lever: a 10% lift in AOV at the same conversion rate gives you 10% more revenue without spending another dollar.

The revenue you got back for every pound or dollar you spent on ads. Whether it's a 'good' ROAS depends on your margin, not your ego: a 3x ROAS on a 25% margin is losing money.

What you paid for every defined user action: a signup, a download, a lead, or a conversion. Broader than CPCo, which is specifically the cost per paying customer.

The return you earned on your total marketing investment, expressed as a ratio. Broader than ROAS because it includes everything: media, tools, salaries, agency fees. The number CFOs open the conversation with.

Qualified contacts your digital activity generated. The primary conversion unit for B2B and professional services. Watch lead quality alongside volume, or you'll celebrate numbers that never close.

The average marketing spend required to get a single prospective buyer to show clear commercial intent. It calculates the exact price tag of turning a passive viewer into a business opportunity, whether they share their details, download a resource, or register for an event.

The percentage of existing customers who choose to stay with your business over time. It is the ultimate baseline check for customer loyalty, proving whether your overall brand, service, and product experience continue to deliver enough value.

The total revenue a customer generates across the lifetime of their relationship with your business. Think of it as the ultimate reality check for your marketing ROI: while CAC (Customer Acquisition Cost) tells you what it costs to get a customer through the door, CLV tells you how valuable that customer actually is overtime.

The total predictable revenue your business expects to bring in each month. Think of it as the ultimate health check for your growth engine: while one-off sales prove you can close deals, MRR shows how effectively your marketing, product, and retention loops build a stable, compounding revenue stream.

Annual recurring revenue: MRR multiplied out across a year. The headline number for subscription businesses and the figure investors and boards actually quote. MRR is the heartbeat; ARR is the annual scoreboard.

The share of customers who came back to buy again. Ecommerce's primary retention signal. One-time buyers are how you make a quarter. Repeat buyers are how you build a business.

The share of users opting into recurring communications or services. A subscription is someone actively saying 'yes, keep showing up'. Rarer and more valuable than it looks on the dashboard.

The unique people who used your product at least once in a given month. The growth north star for many platform businesses (Meta reports MAU as its headline engagement metric). The denominator behind stickiness, and the broadest read on whether your active base is growing or quietly shrinking.

The unique people using your product on any given day. The heartbeat metric for product-led growth. Paired with MAU as a ratio, it tells you whether your product is part of someone's daily workflow.

The share of brand mentions that are clearly negative in tone. Tells you what's broken before it becomes a crisis. Rising NSR is your early warning system: address the cause while it's still a conversation, not a headline.

The share of referred prospects who become customers. The proof point of advocacy: referred buyers convert at multiples of cold traffic because your customer did the persuading first.

The number of new users every existing user brings in, on average. When this number passes 1.0, your product grows itself without acquisition spend. Rare in the wild, and usually a product with sharing baked in, not a campaign that 'went viral'.