Articles on accuracy
Every GhostPane article about accuracy — 6 in total.
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How many pageviews are your ad blockers hiding?
Published estimates range from 10% to 40%, which is another way of saying nobody's average applies to you. The gap is measurable on your own site, and the method is simpler than it sounds.
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How much of your traffic is bots, and how to stop counting it
Roughly half of all web traffic is automated. Most analytics tools catch only the bots that identify themselves. Here is what the rest looks like and how to exclude it.
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Why your analytics numbers never match
Two tools on the same page will disagree by 10–40%, and neither is broken. Here is every reason why, and which number to trust for which decision.
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Analytics in a single-page app: the four things that break
React, Vue, Astro and the rest all break analytics in the same four ways. None are difficult to fix, and all four are silently wrong until somebody checks.
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Safari, ITP and what actually happens to your analytics
Intelligent Tracking Prevention caps first-party cookies, blocks third-party ones outright, and strips some referrers. Cookieless measurement sidesteps most of it, but not all.
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Server-side versus client-side analytics: what each can actually see
The debate is usually framed as accuracy versus detail. That is roughly right, but the specific list of what each side can and cannot observe is more useful than the slogan.