Information architecture of the website never sorts out the content in any way. Without architecture the information on a website is available at the same level and no hierarchy is followed. The currently followed navigation strategy leaves 75% of the website documents orphan and the targeted keywords are not used in the navigation. Search engines like website content to be fed in SILO manner.
The concept of silosSearch engines often unable to identify what your site is all about due to mismanaged website architecture. Siloing also known as teaming is a website architecture technique. It is used to split the focus of a site into multiple themes. Siloing is basically used to create website that ranks well for both common and more targeted keywords. By implementing proper siloing site owner can ensure that their pages rank well for theme-specific keywords, as well as general site keywords.