Link rot is a problem that affects everyone using the internet on a daily basis. This is when a link becomes dead and no longer links to where it’s supposed to because of site changes. Either the owner stopped maintaining and paying for the domain/hosting, the structure changed, or it was deleted or inaccessible for another reason. Nothing is permanent online (unless it’s your ad data

The problem can be combated by using web archivers , and linking to primary, trusted sources as much as possible. Additionally, it’s helpful to copy + paste the information that’s relevant from the site you’re sharing/linking in case it dies somehow later on.