How do I… · Photoshop
One click gets you 90% of the way, and the last 10% is a layer mask. Do not delete the background — mask it, so you can fix the edge afterwards.
The quick action Remove Background in the Properties panel does all of the above in one click, but gives you the mask without the selection, so refining is the same job either way. Hair on a busy background is where automatic selection fails; a plain backdrop when you shoot saves an hour later.
This page is written by the people who make Open Portal: press Ctrl+Shift+O, box any part of your screen, and ask about it. Photoshop included — it works in every app, because it reads pixels rather than plugging into anything.
Faster than searching: box the part of your screen you cannot work out and ask about it directly — in Photoshop or anywhere else. Answers arrive where you drew the box.