I've noticed that the "share" links on answers and comments note that they not only include the answer ID, but the user's ID as well:


Why does Stack Exchange do this? Obviously, it is tracking it, but for what purpose? Does this affect the user?

  • 19
    +1 for totally confusing me by your screenshot. :D
    – yo'
    Commented Mar 9, 2017 at 23:48
  • 3
    I feel there should be a switch or option for this, as some people are more conscious of privacy, and not wanting to be tracked, rather than badges or incentives. At least Stack Exchange tells us about the embedded ID. Commented Aug 22, 2020 at 14:52

2 Answers 2


They include your id so you can earn the Announcer, Booster and Publicist badges:


as far as I know that's the only use of the user id in the link.


You get a badge for it. Who doesn't like incentives?

The three badges are Announcer (bronze), Booster (silver), and Publicist (gold).


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