Today I edited this question to be more compact and actually state the problem, in order to use it as a reference question for any time a user posts an "I get a 500 Internal server error!" question.
I did not significantly change the meaning of the title, I made it better findable for future searches. The title was:
Deploying website: 500 - Internal server error
I changed it to:
How to find the underlying cause for an HTTP 500 - Internal server error in IIS?
The terms '500 Internal server error', 'deploy', 'web' and 'site' are still on the page, and the title is now more helpful if you link it as a duplicate as it describes the actual question. You can also get this error without deploying, so in my opinion the original title was worse than what I made up.
Another user however thought the original title was better, because I apparently am "wrong on what google think". I don't know what search term that user used, but I don't agree.
I don't want to start a rollback war, but I think my title was more descriptive and is more helpful for future searches and linking to the question.
What do I do now?