01
What it is
GA4, Search Console, Google Ads conversion tags and the Meta pixel, installed and then verified against live data. Plenty of sites have tags installed. Far fewer have tags that fire.
Every other service on this site reports through this layer. Ads optimise against conversions, SEO proves itself through search data, email earns its keep in revenue per send. None of that works if the tags are wrong, and an untracked dollar teaches you nothing on its way out.
Installed is not the same as firing. I have audited accounts paying for clicks with no conversion tag firing at all. That is why every tier here ends the same way: a read-back test against live data, proving each tag fires on the live site before I call it done.