Here you find all texts from your page as Google (googlebot) and others search engines seen it. Site content is the most important thing in seo.The more unique your content is, the bigger chance you have to be indexed by search engines. There are a few things you have to keep in mind. Your content should be more than 300 characters long, or 50 words, it should have the keywords you are promoting in well formated senteces, it should have your keywords in (italic) and (bold) tags(but not to much) and it should also contain tags. Avoid using iframes, because the content is not indexed.