Stop words are some commonly used words like a,an,the,from, to etc. Since these words occur atleast once on allmost all pages, previously google and other search engines used to ignore such keywords. If you ever conducted a search with these keywords, you would have seen a message the “the keyword from was ignored”. Looks like Google has changed the algorithm and now uses stop words for ranking the pages.
I found a proof of this fact while analyzing the ranking of a post about removing virus from USB drives. While I search for remove virus from usb, the binaryday post appears at the 6th position. While a search for “remove virus usb” finds the same post at 11th position. Similar is the case with my post for gmail proxy. While the entire world searches for gmail proxy, I am stuck with a title that reads gmail for proxy 
How can you use this for better ranking?
Many users just enter the keywords like gmail proxy, remove virus usb, resume format etc to search for required information. You can make your posts to rank better by removing the stop words from
- the title
- backlink anchor text
- use of keywords in the body
A good way to remove the stop words without making your title to look spammy is to make use of tags. So while my post continues to have a title of “how to remove virus from usb?”, I can add a tag of “remove virus usb”. Next I can edit the theme code to convert the title of the page as “remove virus usb” and that will take care of the ranking issue and the post will rank well for both the keywords. Similarly a little time spent in writing the post copy will help your page to rank for both keywords.
Good TryRemove stop words from your title to rank better652|just some value|9