On Sony PlayStation consoles, starting from version 4, it is possible to take screenshots.
To take a screenshot, hold down the "Share" button at the moment you would like to capture and hold this button until the screenshot is taken.
If you release the button ahead of time, then simply open the "Share" menu, in which you can click on the triangle to take a screenshot or share a picture using PSN or social networks (in which you will need to log in if you have not already done so).