Google has actually gone out on a limb and provided several guides on file and folder naming conventions to help webmasters provide what they consider the best way for visitors and search engines to identify the topic of a site. In order to best achieve this, we will provide some common sense approach techniques to help you sort through the maze that can be Google SEO.
We recommend the following strategy for most of our clients who are creating a new web site. Choose your domain name carefully. Don't rush to get what you think is a great name, that is half the battle. Do a little keyword research on the topic of your site; see what and how many people are searching for keywords in your area of interest. See what is available and chose carefully, taking into consideration both traffic and description. The only reason to get a domain name with your company name is if your company name is very well known and it alone will provide you with the traffic you need to make money online.
Once you have your domain name, for example, mybusinessareofexpertise.com you have to decide on the best file / folder structure. This is achieved by figuring out a general topic. Say you provide general electrical services and the name of your site is my-electrical-services.com, once you have focused your index page for general electrical terms, you must move on to focus on other areas of electrical work.
To save the focus of your pages, you could create a subfolder called electrical-tools, so now your second page will be located in: my-electrical-services.com/electrical-tools/index.html this tells Google that your site is about electrical services and the subfolder and the pages in it are about electrical tools. Then inside the electrical tools subfolder you can create a page about electrical wire cutters and call it electrical-wire-cutters.html.
You probably are beginning to see the pattern. Be descriptive in your file and folder naming structure and you will be blown away by the results.