What is Safelink?
Safelink is a page on a website or blog that is used to detect whether the required URL / link is safe from viruses and malware or not. Safelink is a page that the user visits before going to the required page / site.We often see safelinks on different sites specially on download sites. What they do is they create a new blog only for this purpose and apply a subdomain to it.
This method is not very suitable especially when your running ads from AdSense. They will apply Limit on your account or can ban you from Adsense(In worst case scenario).
It works same as other safelinks but you don't need to go out from your main domain. It redirects visitors to just a certain page. When visitors want to download certain things, they will be redirected to a certain page of the blog before visiting to download page.