Fair or acceptable usage is a term that’s usually tacked onto the small print of unlimited broadband deals.
While unlimited broadband is advertised as having absolutely no limitations on the amount of data you can use, that isn’t entirely true.
You have unlimited use, but only if you use it fairly.
Pinning down what exactly qualifies as fair usage can be a little tricky but you’ll usually have to go out of your way to break the rules.
If you’re file-sharing constantly or using all of your bandwidth 24 hours a day, that isn’t fair usage. However, it is very unlikely that the typical customer will come anywhere close to that.
Fair usage clauses aren’t there to stop you getting the most out of your broadband, they’re there to stop individuals and businesses intentionally exploiting unlimited data allowances on home broadband.