There are a lot of different models on the market, and there’s not just one smartwatch that suits everyone. It’s all about which priorities you have and what you require of your watch. If you need the watch mainly for fitness, you should pick a model with a lot of fitness features, while this might not be as important if you mainly want to use the watch to see your notifications or send texts.
Something important to consider is to choose a watch that has the same operating system as your phone. If you, for example, have an iPhone, you need to select a smartwatch that supports iOS.