Rendered vs Response

As search engine crawlers (and in particular Google) continue to integrate rendering into their crawling and indexing process, as SEOs we need to pay increasing attention to the effects of rendering on our web pages.

Traditionally, crawlers - both search engine crawlers and 3rd party crawlers like Sitebulb - would utilise the response HTML to extract links and content. These days however it is more complicated, as search engines are also rendering webpages (and firing JavaScript) before indexing of a page is completed.