Chances are that if you are researching how to choose the right web host, you aren't starting the next Yahoo, and are creating a smaller or medium sized website. So that is where we will start. If you are going with a small site you are fairly safe choosing a cheaper web host. You don't need much disk space or bandwidth for a website like this. And most companies will let you upgrade easily if you want more.
Most of you are probably researching web hosting for a small or medium sized company. It is very important for businesses to think about possible growth and needs. Growth is what all businesses want to achieve, so make sure you don't limit yourself. More traffic will require you to get more bandwidth. More products to sell means you will require extra disk space. 100 MB of disk space is an alright place to start, but make sure the host lets you upgrade. Remember to think about any possible growth your company will encounter. I love to have extra disk space to use for backing up files on my computer, disk space comes very cheap now. Bandwidth all depends on the amount of traffic your website will get every month. 1 GB of bandwidth is a fairly safe place to start, but again remember to make sure you can upgrade.
Some more factors you need to consider are auto responders, mySQL databases, support, spam protection, email accounts, site stats, additional domains, uptime, site builders to mention a few. Because you may be buying traffic for your company site, the uptime of your host becomes important. If your website isn't up then you are paying for zilch and that stinks. It is unlikely you will find a company that guarantees 100% uptime, because every company needs to fix things from time to time, but look for one with 99.9 or 99.99% Great technical support is important for first time website owners. It is also important so you don't have to wait a week for answers if there is a problem. Email accounts are important so you look more professional when sending an email. Using a hotmail account when sending a business email doesn't look to hot. You should look for 20+ email accounts, but this isn't hard to find anymore. Many companies offer unlimited accounts. Drag and Drop website builders are a great addon that many hosts offer. The ability to host more than 1 domain is a considerable bonus so you don't have to set up a new hosting account if you want to add a domain. I would look for a web host that offers unlimited domains. You should also make sure the host has CGI and also MYSQL for databases. CGI access will let you run scripts from your website to interact with your users.
If you are here because you are creating a very big website then you are going to have to look for hosts that offer more bandwidth and more disk space. You should look into getting dedicated hosting if the cost isn't of much importance to you. At some point I will write an article about choosing a host for larger websites, but I don't think people at this stage will require much help picking a hosting company.
Well you now know what you should look for in a company, finding them is another problem. http://www.web-hosting-pros.com provides an updated Top 10 list of web hosts. Visit them to compare the tops hosts in terms of uptime, disk space, features, bandwidth and price. You may notice that many of the hosts offer tons of disk space and bandwidth, having too much is never a bad thing if the price is still right. Presently Web Hosting Pros' featured hosting service is offering a marvelous deal that anyone shopping for hosting needs to take advantage of.
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Stanley Goodspeed has been putting up websites used for internet marketing for many years. He assists his friends at http://www.web-hosting-pros.com keep a recently updated list of the best web hosting services available.