Sometimes your website or the theme you selected for your website has it setup where you post one article on multiple pages. A user can then go through the article one “step” at a time using the next or previous arrows. This helps separate the content in several different categories. There are also many other uses for this and it appears that while Google has implemented features to track content together Bing does not.
If you write a multi-step article with multiple pages to walk through it could effect your search engine rankings within Bing. The reason is that their algorithms see them as separate pages.
It is rather unclear at this time to see how bing will diferentiate between the pages, however this is what Bing’s Duane Forrester said:
We may use our newly gained knowledge on your site’s structure to provide easy access to other sections of the paginated or sequenced content from our results pages in the future. In addition, webmasters implementing these elements may benefit from more comprehensive indexing over time as we apply our newly gained knowledge of a site’s structure to our indexing heuristics.”
Source: Search Engine Land