Hello aspirant!
Hope you are doing well!

Let me start with basic, the definition of bits
One bit is the information entropy of a binary random variable that is 0 or 1 with equal probability,
Or it can be also stated as the information that is gained when the value of such a variable becomes known.

Background Intelligent Transfer Service ( BITS ) are used by the programmers and system administrators to download files from or upload files to HTTP web servers and SMB file shares .

Hope this helps