That will return a Boolean, in the example above that would return FALSE as 6 does not equal 5.
You would use this for doing a comparison and returning TRUE/ FALSE.
Take the below for example, in the first part of the code: 6 and 5 don't match so you get a FALSE
In the second part 5 and 5 do match so you get a TRUE:
Sub test() Dim b As Boolean b = 6 = 5 Debug.Print b b = 6 = 6 Debug.Print b End Sub