Create great content | Google Webmaster Analytics Tools

One key element of creating a successful site is not to worry about Google's ranking algorithms or signals, but to concentrate on delivering the best possible experience for your user by creating content that other sites will link to naturally—just because it's great.

When you're writing a post or article, think about:

• Would you trust the information in this article?
• Is the article useful and informative, with content beyond the merely obvious? Does it provide original information, reporting, research, or analysis?
• Does it provide more substantial value than other pages in search results?
• Would you expect to see this in a printed magazine, encyclopedia or book?
• Is your site a recognized authority on the subject?

Keep an eye out for the following problems:

• Does this article have spelling, stylistic, or factual errors?
• Does the site generate content by attempting to guess what might rank well in search engines?
• Is the content mass-produced by or outsourced to a large number of creators, or spread across a large network of sites?
• Does this article have an excessive number of ads that interfere with the main content?
• Are the articles short or lacking in helpful specifics? 

Google’s Webmaster Guidelines outline practices that could negatively impact your performance in the search results, or remove you from the search results entirely. If we detect problematic content on your site, we’ll notify you using Webmaster Tools. We strongly recommend becoming familiar with our guidelines, as well as our tips for creating Google-friendly sites.

If your site contains user generated content, make sure to have a firm spam policy in place early. Check out this video for more tips on keeping sites with user generated content spam-free:

Reference BY: Support.google.com/webmasters/?hl=en