compelling

very interesting; able to capture and hold one's attention

The novel was so compelling that I couldn't put it down.

The dirty secret of the internet is that all this distraction and interruption is immensely profitable. Web companies like to boast about "creating compelling content", or offering services that let you "stay up to date with what your friends are doing", "share the things you love with the world" and so on.

capable of causing someone to believe or agree

He made a compelling argument.

Terry's goal looked to have put Chelsea in control on the stroke of half-time but Arsenal's response presented a compelling case for Wenger's insistence that reports of his side's demise have been greatly exaggerated.

strong and forceful; that causes one to feel like they must do something

I would need a very compelling reason to leave my job.

An act of compulsion; an obliging somebody to do something.