Backlinks are links from other websites pointing to your site, and Google uses them to decide how trustworthy and popular your site is. Buying backlinks means paying other websites to link to yours, which goes against Google's rules. When Google catches this, it can lower your site's ranking, which means fewer people will find you through search. In serious cases, Google can remove your site from search results completely. So do you think the risk of buying backlinks is ever worth it, or is it always a bad idea?