The monthly traffic feature, which is at times also referred to as bandwidth or information transfer, identifies the overall volume of data that can be uploaded to your cloud hosting account and downloaded from it monthly. The traffic is produced mostly by web site visits - every time somebody visits your site, the webpages they see are downloaded from the hosting server to their machine or smartphone and they are displayed by the web browser. What counts for the traffic produced is the overall size of these webpages, so the more website visitors you have for some period of time, the more website traffic will be produced. Along with the web site visits, file uploads will also be counted towards the entire monthly transfer i.e. any time you upload site content or some other files through a file manager or an FTP program, they will also generate some traffic. The counter resets on the first day of each and every month and it is not related to the date you've subscribed or the date you have renewed the web hosting plan.