They sort of have watches categorized by sport/purpose if you know why you want a watch, but most of them do basically the same stuff and the main differences are battery life, appearance/build, and whether it has GPS.

I wanted something I could use to navigate and track multi-day backcountry hikes, so I got a Fenix. My wife wanted to go for a run without bringing her phone with her, so I got her a forerunner. There are lots of options, but even the cheapest watch is good enough if you just want to track steps and basic activities.