Content and links is the primary focus of search engine optimization specialists. Adding new unique optimized content is essential for building more entry points to your website from the search engines. Building links to that content is essential for it to be found by your readers. If you want your content to be found by people entering your main search phrase in Google or another major search engine the content must rank on the first or second page.
So how do you know if your links have been indexed by the search engines?