Reasons for increasing bandwidth

[leochitiyo]

what are the factors leading to bandwidth increase

 

[Emerald]

more people using the internet at the same time streaming and online gaming.

another reason could be malware/virus that communicates to the outside world

 

[sk1939]

more people using the internet at the same time streaming and online gaming.

another reason could be malware/virus that communicates to the outside world

Those are reasons for a bandwidth decrease, but the OP was asking about an increase, in which case the first two would be applicable, as well as needed capacity increase due to an increase in the number of users.