just to add on to what folks have said, here’s a specific example:
You copy a YouTube link and send to a friend. The link ends with &sid=12345678
Youtube knows who you are and it knows who your friend is. When it creates the link it knows “Linktank created link 12345678”
When your friend opens the link, now YouTube knows “this person has some relation to Linktank.”
With this YouTube can find out who you know and what you share with each other, without you ever having to tell them directly. Whether that’s something you’re ok with is up to you.
just to add on to what folks have said, here’s a specific example:
You copy a YouTube link and send to a friend. The link ends with
&sid=12345678Youtube knows who you are and it knows who your friend is. When it creates the link it knows “Linktank created link 12345678”
When your friend opens the link, now YouTube knows “this person has some relation to Linktank.”
With this YouTube can find out who you know and what you share with each other, without you ever having to tell them directly. Whether that’s something you’re ok with is up to you.