Number of thread views vs members who have read the thread

[ThomasL]

Hello guys,

I would like to ask you something. What is the difference between the number of thread views and number of members who have read a thread?

For example. a thread in my forum has about 2000 views and If I click on the thread, and I check the number of member who have read the thread, they are about 20.

What is the difference?

Thanks