It has many names and you can get there through mindfulness and meditation.
My tip is go into nature. I don’t mean some shitty dog park. I mean nature. Take a bottle of water. The first hour you’re gonna feel awful and you want to go home, get through that, and you’ll see what I mean.
Another more advanced way is to just stop. Just don’t do anything for as long as possible. 10 minutes. An hour. When you become practiced it’ll be easier. Try different spots, and you’ll notice some spots are more conducive. For example busy train stations work for me.