UX metrics categories for a web app

We want to start using metrics to help drive design improvements. I like to tackle things from a high level down approach and I am trying to find some categories of metrics for web apps but not have any luck with this. (Just for the context of why I want these categories: my team is going to start creating a list of the metrics we want our Telemetry guild to gather for us and I want to to categorize these metrics to make it easier to talk about them and prioritize them. I know that categories will emerge naturally once we start listing important metrics but I thought it would be good to get an idea of what the industry is using in terms of categories or metric types at the start as well.) Does anyone have any resources for this? Nothing I Google is giving me what I am looking for - just lots of links to analytics tools.