Use plain language and keywords in file and directory names
Use your major topical keywords in your file and site directory names. This helps a bit with search optimization, and it makes the organization of your site much more understandable to both your users and your partners on the web site development team. Always use hyphens in web file names, since hyphens are “breaking” characters that divide words from each other. For example, in the file name “bengal-tiger-habitat.html” a search engine will see the words “Bengal,” “tiger,” and “habitat” because the words are separated by hyphens. If you use “nonbreaking” underscore characters as dividers or run the words together, the file name is seen as one long nonsense word that won’t contribute to page ranking. The file names “bengal_tiger_habitat.html” or “bengaltigerhabitat.html” are equivalent, and neither is ideal for most search engines