Total number of bytes for pages, images and files downloaded by web browsing.
Note 1: Of course, this number includes only traffic for web only (or mail only, or ftp only depending on value of LogType).
Note 2: This number does not include technical header data size used inside the HTTP or HTTPS protocol or by protocols at a lower level (TCP, IP…).
Because of two previous notes, this number is often lower than bandwidth reported by your provider (your provider counts in most cases bandwidth at a lower level and includes all IP and UDP traffic).