Poker is a game of skill that requires concentration. It is also a game that requires observation of your opponents (if playing in person) and of their body language. This constant attention to detail improves concentration and helps you develop an intuitive understanding of things like frequencies and EV estimation.
Another benefit is the social skills you will develop while playing poker. Unlike video games that put you in front of a screen and isolate your interaction with other players, poker involves socializing with people of all different backgrounds and interests at the table. This social interaction, whether at a live or online poker table, is great for improving your communication abilities.
Finally, poker teaches you how to control your emotions. This is very important because in some situations an unfiltered expression of emotion may be justified but in others it can lead to negative consequences. Keeping your emotions under control allows you to be more effective at the table.
Aside from learning how to control your emotions, you will also learn how to adjust your strategy as needed. A good example of this is if an opponent starts to play against you in a way that deviates from your usual strategy. This is why it is so important to be flexible and have a wide range of tools in your arsenal. The ability to change your strategy quickly will allow you to maximise EV and win more pots.