All website have to have a domain name. A domain name is a registered name of the website and cannot be a duplicate. A domain name is also called URL or web address and all of them end with .com,.net, .org, .biz, .gov or .edu.
When you have a website, a web address and a host for your website, then your website is in the internet or word wide web and if I search in goggle, yahoo, MSN or any search engine for your web address or your URL, I should see your website on the screen if your website has been indexed by one of the search engines because I am calling specifically on your web address. If I don’t see it, then there is something wrong either your host is off, the root of your website is down or someone is working on it or I am typing a wrong web address.
Your website has been saved somewhere in your computer when it was made but the root of your website is saved in the host computer which has to be on 7/24 all the times because it has to be available to outside word at anytime. That is why if your computer is off or down or even broken, your website is still available through your host computer to everyone.
Your website has two faces, a visible face that you see it on the screen and the invisible face that is behind the scene.
When the search engine crawler visits your website, it goes to the invisible part of your website which is called html because most of it consists of html codes and tags.
Html page has two parts: head and body. Head has the most important part of your website such is title, description meta tags and keyword meta tags of your website.
Body contains the content of your website which shows on the visible page on your site. You never see anything from the head part of your site on the visible side and if you ever had access to HTML of your website, don’t mess with anything in the head section because it belongs to search engine crawlers.
The search crawler looks for the relevancy between whatever is in the head section and whatever in the body section of your website.
If the title of your website which is on the top of the head says that you do appraisal but the body of your website says that you do fishing, then there is no relevancy and you won’t get any ranking. Nobody can find you unless they search for your web address on the search engine because your site still exist in the web but it is not searchable based on what you have in the head and body section of your website.
That is enough technical. I may have confused you already.