Why Google may overlook your website
The “tree falls in a forest” adage suggests that if no one is around to hear the sound, it may not exist at all – and this translates perfectly to search engines and web content. In web terms, if no one links to your content, the search engines may simply ignore it.
Search engines by themselves have no inbuilt gauge of quality and no way to discover great pieces of content on the web. Only humans have the ability to discover, react, comment and link to good content.
Popular search engines such as Google and Bing can do a great job of promoting high quality content on websites that are seen to be popular, and they measure this popularity by the amount of links (backlinks) pointing to that site.