I Wasted Two Weeks Looking at the Wrong Metrics Here's something nobody tells you early enough: GA4, Looker Studio, and dedicated SEO analytics tools are not interchangeable. They answer different questions . I spent two weeks diagnosing a traffic drop by staring at GA4 dashboards before realizing the problem was a crawlability issue GA4 is architecturally blind to. The fix took 20 minutes once I was looking at the right tool. This article is a practical breakdown of when each platform earns its place in your stack, with real code for pulling data from each. If you've been working through a JavaScript SEO checklist and hit a wall trying to figure out which tool actually surfaces the data you need, this should clear things up. GA4: Great for User Behavior, Blind to Crawlers GA4 is JavaScript-first. That's both its strength and its hard limitation for SEO work. What it's genuinely good at: session data, conversion funnels, event tracking, audience segmentation.…