Removing metadata

It is almost never useful when viewed on the web. Unless you know why you want to keep it, get rid of it.

Oh really? I thought it was there for search engines. But it’s really useless then?

Completely useless. Pretty sure the search engines don’t care about it, since Google and Yahoo both tell everyone to get rid of it: https://developers.google.com/web/fundamentals/performance/optimizing-content-efficiency/image-optimization#image-optimization-checklist