What do I have to know about meta-data of pictures I upload?

[noname223]

Yeah I could a google search but I always like to interact with savvy IT experts on this forum. They seem to be so cool. Can online links to another website contain meta-data? This is probably a very dumb question...
One more. What is concerning meta-data more dangerous screenshots or for example pictures you have made from your smartphone?
I am very uneducated about IT topics. Maybe you can tell me the most important stuff which is necessary to know.

 

[Interloper]

Can online links to another website contain meta-data?

Yes, they can contain trackers that help big companies build a profile on you. (maybe not exactly what you were asking though)

What is concerning meta-data more dangerous screenshots or for example pictures you have made from your smartphone?

Screenshots do not hold the same amount of sensitive information, if any at all. For pictures taken with a camera, most websites will strip the sensitive stuff when you upload a picture to it AFAIK.

You can use an exif viewer to compare, or http://exif.regex.info/exif.cgi