How to recognise a good wine list

We have been talking about the top 100 Sommelier list for 2025, but how do we know if the wine list is a good? How do we know if the restaurant has a sommelier? And why is this important? Firstly I believe this is important because if a restaurant cares about the drinks they will undoubtedly care about the food, so the establishment must be good. Here are the things to look out for in my opinion.