To offer advice or suggestion to resolve a problem. Often used in context of emphasizing common sense, a very strong opinion, or to belittle/mock a person's point of view.

Likely taken from GamePro magazine, which used the term as early as 1989 in conjunction with screengrabs of video to capture reader's attention to offer advice on completing video games and tying the term into the publication's title.

Obvious advice sarcastically presented as sage wisdom.

A phrase by the Youtubere Dan and Phil
On their April Fools video

A small tip or advice to help you with crafts. The quote plagues the Internet and the phandom makes sure it's in the comments of every YouTube video.

A tip intended to convert a novice to an expert.

A term used to precede an offensive piece of advice, usually intended to lighten the blow. Often used amongst friends within this context.

A helpful piece of information or advice that may be generally unknown or secret. Originated in GamePro video game magazine.

- an unrelated comment or response to something.
- originating from Dan & Phil's "Glitter Faces" YouTube craft video, wherein they keep saying "protip". And that's when every comment section on YouTube was destroyed.