One of the simplest methods to improve your search engine optimization is to look at the way you name your files. Google give lots of importance to file names. You should think what are you going to put in your web page and then give it a relevant file name. How important is your filename? When you do a search in the search engines, most of them will highlight keyword(s) in your filename or your directory path. In other words Google is signalling the importance of filenames by highlighting it.