if you hit the window button+tab(like alt+tab but window button) it will show you. Once it pops up you don't need to press either button anymore.
You can scroll and see previous windows opened, even has a search bar though I've never used it.
You can also create new desktops, basically a virtual desktop. Similar to what Linux does if you ever used it, say you have 20 things open on your desktop, you want to make more space but can't close anything, you can create a new blank desktop and still have all those programs open.