What has made the biggest difference to your website traffic, and how are you measuring it?

To track traffic with Google Analytics, Google says you create a property, add a web data stream for your site, then paste the Google tag immediately after the head on each page.
https://support.google.com/analytics/answer/9304153?hl=en
The full answer on improving website traffic is on the blog:
https://aiwebpageseo.com/blog/how-to-improve-website-traffic
Which change brought you the most new visitors, and do you measure it in Analytics, Search Console or both?