You may refer to the below steps for taking the screenshot on Android:
If you’re using Android 4.0 or later, press and hold the Volume Down and Power buttons at the same time. You’ll see an animation on the screen, indicating that the screen photo was saved. Android will save the image to your Gallery, open it to view and share your screenshot.
On many Samsung phones, you can press the Home and Power buttons at the same time to take a screenshot.