What does “data transfer” mean?
In general, “data transfer” refers to any data transferred into or out of a site. For example, graphics, text, movies, sound files, programs that you or your visitors either download or upload are all considered to be data. Every time a web surfer visits your web pages, data is transferred from our server to their computer. As you want a lot of people to “hit” your site, you want a plenty of data to be transferred!