What I like the best is the Google update timeline graph, so it's easy to see why your rankings shifted.

I manage over 30 sites related to my business. And many are full of articles, mostly evergreen articles, and mostly are from the same industry. Serpwatch has helped me understand how all this content is performing, as in what articles i should invest more on and also the adaptations i need to do, in order to be closer to my desired keyword. Also the canibalization feature helped me the situations where some of my own articles and sites were competing with each other.

SerpWatch has a well designed, clear interface. This makes it an easy tool to use. (Why others don't follow a similar route beats me.) I like the easy way in which one can change notification frequency and channels (including Slack). The agency (whitel label ) feature looks useful, but I've not used it yet. Final point: nice people and responsive help available via online chat.