I've setup GA on pretty much every project I've worked on for the last 8 years. It's a handy thing to have up and running for basic metrics about your website/app. But to be honest, I find GA actually to be quite onerous in determining the kinds of things that UI/UX Designers would like to know. My advice would be to make sure you look at something like https://www.fullstory.com/ which captures all the little details and unexpected behaviours that are really important to understand. Without this kind of detail, you can very easily read GA data wrong.
I've setup GA on pretty much every project I've worked on for the last 8 years. It's a handy thing to have up and running for basic metrics about your website/app. But to be honest, I find GA actually to be quite onerous in determining the kinds of things that UI/UX Designers would like to know. My advice would be to make sure you look at something like https://www.fullstory.com/ which captures all the little details and unexpected behaviours that are really important to understand. Without this kind of detail, you can very easily read GA data wrong.