To have a Web site on the Internet you first need to have a Web server. Unfortunately, owning a Web server can be very costly and requires technical expertise that most businesses don't have. This is where Web Hosts come in. Web hosting companies provide the equipment and other technical resources that you need without the headaches that comes when you have to do it yourself.
Think of a Web Host as the landlord of building. A landlord rents out storefronts to various businesses. Each business decorates and runs their store differently, and doesn't worry about the maintenance of the building. In a similar way a Web Host rents out space on a Web server, (or entire Web servers), to various businesses. Each business builds their own Web site and never has to worry about the maintenance of their Web server.
In other words, the Web Host provides the place on the Internet where your Web site lives. It's a lot cheaper than buying you own server, and you don't have to worry about all the updating or headaches that comes with.
What is Bandwidth???
Bandwidth is the amount of data that can be transferred over the network in a fixed amount of time. On the Net, it is usually expressed in bits per second (bps) or in higher units like Mbps (millions of bits per second). 28.8 modem can deliver 28,800 bps, a T1 line is about 1.5 Mbp.
If you don't have enough Bandwidth then that's when sites go down. It's like a car and gas; If you don't continually make sure your have enough gas your car will stop. Same with your web site and that what we do... continually make sure your site has enough Bandwidth so it's always up.
Something that seems to baffle many webmaster is the term bandwidth. They do not understand exactly what bandwidth means or what is mean by bandwidth theft. A simple description for bandwidth, is the resources a site uses on the computer who's server their site is housed on. Each time a file like a page, image, animation or midi etc. is loaded from a site, it is using a certain amount of resources or bandwidth from the computer it is on.
You can also think of bandwidth similar to the electricity your refrigerator takes to run. When someone links directly to an image on someone else's server instead of copying it to their own computer and then uploading it to their own server, it is similar to your neighbor running a cord over to your outlet to run his own refrigerator. While it is convenient for him, it is the person that has the plug in that has to pay for the extra usage.
There are many servers that set a limit to the amount of bandwidth a site may use each month and after that limit is reached, a site may be closed and the webmaster sent a large bill that must be paid before they can open their site again. Some artists can not afford this and may be forced to closed permanently. If you really admire the artist's who's work you are using help them keep their sites open by not stealing their bandwidth.