Annotations have finally landed in GA4 and allow users to add them for time periods and have them displayed in graphs across the platform. Annotations were a very popular feature of Universal Analytics and have been much requested in GA4 since it launched.
Annotations are a great way of applying context to your GA4 data. For example, they could be used to note offline advertising campaigns, tracking changes, website/page launches, technical SEO changes, PPC campaign launches, Social Media campaign launches, or anything useful to your business to remember when reviewing website performance data in GA4.
