Certain types of site navigation and site structure may hold back or entirely prevent search engines from getting your website's content. As search engine spiders crawl the internet, they rely on the structural design of hyperlinks to find new documents and revisit those that may have changed.
Complex linking strategies and deep site structures, with little distinctive content and too much graphics may serve as "bumps", while the information that cannot be accessed by spiderable links may qualify as "walls." So don't use fancy editing tricks to tell a story. Use them only to enhance the story.
Possible "Speed Bumps" for SE Crawlers:
Possible "Walls" for SE Crawlers:
The best way ensuring that a site's contents are completely accessible by spiders is to have direct, static HTML link to to every page you want the search engine to index and rank in the results. Always consider that if a page cannot be directly accessed from the website’s home page, that is the page where most spiders will start their crawling, it is less likely to be indexed by the search engines. A sitemap can be of tremendous help for this purpose. If your site don't have a sitemap, you can create one using our SiteMap Generator tool.