When any content is uploaded to a shared hosting account or downloaded using it, some website traffic is produced and that is an aspect that each hosting plan comes with. It is moreover one of the features you should check, since the amount of website traffic quota you will need depends upon what you need the account for. The traffic is mostly produced by downloads including site visits. In layman's terms, anytime someone visits your site, the pages are downloaded from the server on his/her computer and they're then displayed by their internet browser. It's of course important to know that uploads matter too, and every time you copy larger files from your computer to the server, some traffic is generated as well. Different companies may have different names for this feature, such as traffic, bandwidth, data transfer, however they all apply to the same thing - the exact amount of incoming & outgoing data produced for a given period of time.