Search Engine Optimization

Yes a free hosting can cost you more than paid one. As most of us think wow i got free hosting now i don't have to pay and i am saving but you do pay and how i will tell you.
There are two kinds of hosting:

Shared hosting : This means that your web site will be sharing space with a number of other sites. The host manages the service, but it is your responsibility to maintain your site. The major problem with this scenario is that if one of the other people sharing the site experiences heavy traffic your site could go down as your host tries to accommodate the heavy load of visitors.You can get this one for free but you will regret it only

Dedicated hosting. :In this scenario you lease a server from a host. You'll pay more, but because you're not sharing, traffic with other web masters you don't have to be concerned about your site suddenly appearing to degrading or disappearing. This option is sometimes divided into unmanaged hosting, which provides limited support for lower fees, and managed hosting, which costs more but provides higher-level support, maintenance, security, and services.

Free web hosting has some MAJOR disadvantages, especially when it comes to search engine optimization.
One of the main reasons to stay away from free web hosts is that search engine spiders and robots hate the pop up advertising that free web hosts always use to subsidize the cost of allowing you to use their space. Many search engines and spiders won’t read these pages for content at all, especially if they contain a lot of pop up banners or images which are merely read by the bots as blank space.It is also typical for the web host to add an increasing amount of pop up sites and web banners to your page to get you so annoyed that you finally spring to pay for a “real” URL.The presence of pop up frames cause big problems.Google, Yahoo search engine spiders, crawlers and bots don't even bother to crawl a site with pop up frames