This is a very useful web site if you build your own web pages. It allows you to see your pages the way search bots see it. All you do is type your url into the search field and it displays your page as it would be seen by the robots. Anything that is not visible to you is not seen by them. Load up your home page and then see how easy it is to navigate round your site. If you can't easily get from one page to the next and back again because your links are hidden in images then neither can the search bots. This system easily shows up problems that might otherwise get overlooked. You do have to prove you own the site before it will work but that is simply a matter of creating a blank page with a given heading and uploading it. It's totally free and recommended by Google. Just click on the logo or this blog title.