How to make a website for search ads without infringing the copyright of the message boards?

Question

Copyright

Made a website for searching ads for renting apartments. The meaning of the site is that the user enters search criteria (number of rooms, price) and receives links (with a small description) to ads from the boards. I'm afraid that there may be proceedings regarding the copyright of the bulletin boards. How to design your site for search in such a way as not to violate anyone's rights?
Perhaps not so expressed. I want to know what information and in what quantity, from third-party resources, I can use to fill my own site, without copyright infringement?

Answer 1

Ad sites do not have copyright on the ads they place. First, in such announcements, as a rule, there is no sign of protected works. Second, ads are posted by users.
Therefore, if you violate something, then these are the rights of users, but not ad sites.