So I'm on ahrefs looking at my backlink profile, and I see this category with the following items: - Text - Redirect - Frame - Form A few questions: - Redirect link: is this when you purchase a domain and just set it up to redirect to your site? Or is it a PHP redirect that they're talking about? - What exactly is a "form" backlink? I've been racking my brains but I have no idea. - How important is it to diversify all of these? Is there a general guideline for what percentage of your links should be text/redirect/frame/form? Thanks!