It's a word that actually refers to a very simple thing.
In computer systems, metadata is basically the information of the file (i.e. file size, date created, date modified, etc.)
Metadata is—for the most part—specific depending on the type of file. For music and video files, it can include information such as length, bitrate, artist, title, resolution, etc etc.
"Before sharing the document, make sure to remove any sensitive metadata such as author names, revision history, and comments to protect the privacy and confidentiality of the file"
Sister: This meeting was to discuss the rough draft of my essay, where we discussed the subsidiary questions I added in my rough draft. We also discussed the relationship between my main title and the real-life situations I chose to use in my essay. We discussed the structure of my essay as well, specifically the Math AOK section and how it relates to the contradiction of the title. This second meeting was particularly helpful in discussing the implications of my essay claims and how to apply the title across various areas of knowledge. There were many sections of the essay that could have been cut down in wordiness and the ways of knowing required further and more in-depth analysis.
An absolutely foolproof way to keep minors from viewing content deemed "too mature" for them to watch.
Billy: "So I was trying to watch some videos for an M rated game, and I ran into an age gate, so I put in my real birthday. SOMEHOW it managed to figure out that I am 12. CURSE YOU AGE GATE!!!"
Bill: "Fucking age gate! *quick scroll* THERE! I was born on January 1, 1904. Fuck you age gate."