Data is in every aspect of a computer and website and includes all of the operations that are made up of characters and symbols on any computer. Data is recorded through some method, either optically, magnetically or through electrical signals or other media. Data can be given numerically or alphabetically or through symbols. It can also be given graphically.
Internet flow manages the amount of data that each user is able to garner and is dependent upon the equipment used and the internet package. Some data is limited by the amount which is paid for where other deals allow unlimited data.
Due to the different limitations, mainly between the device used to access the site (laptop, mobile, tablet), web sites try to effect communication in the least amount of data to reach the highest amount of users.