JD_Toims - 5:42 pm on Aug 1, 2013 (gmt 0)
SO please suggest me how many CSS file we can you for website to make the website search engine friendly and help the pages load faster.?
I only ever use one, because although CSS isn't usually a large download item, each new file results in a new upstream request to the server and most browsers usually only open two connections to a host at any given time, so when there's 4 CSS files nothing else starts downloading until 3 of them are complete, but if there is only one CSS file the "next resource" will be downloaded concurrently.
So, the "short answer" is yes, extra requests to the server for CSS (or anything else) that keep a different resource from being requested can slow your site loading down, but it's not a huge deal unless your site is slow, because connection speeds are only getting better these days.