If you're grabbing a screenshot, chances it's for a reason. Most people get a screenshot, it puts a file on their device, then they do something with the screenshot, or let it just sit there until they have so many that they are cluttering the desktop.
Instead of taking a screenshot on your computer and then doing something with the file, put the screenshot into your clipboard and then do whatever you need: paste it into a message, copy it into a presentation, email it, open it in an editor, etc.
Windows users can do this in a variety of ways: https://www.businessinsider.com/how-to-screenshot-on-windows
Mac users just need to learn a slightly convoluted keyboard shortcut. https://support.apple.com/en-us/HT201361 The key to the clipboard part of this is buried at the bottom of this article: To copy a screenshot to the Clipboard, press and hold the Control key while you take the screenshot. You can then paste the screenshot somewhere else. Or use Universal Clipboard to paste it on another Apple device.
Universal Clipboard is even better
If you're a Mac user, the "universal clipboard" is even more powerful: copy it on your phone, paste it onto your laptop. Or vice versa. It's extremely simple once you link your devices together with a common Apple ID. https://support.apple.com/en-us/HT209460
Windows users can do this too: https://support.microsoft.com/en-us/windows/clipboard-in-windows-10-c436501e-985d-1c8d-97ea-fe46ddf338c6