Probably and hopefully a simple one. What is the difference in how the following segments count as they all give slightly different numbers? I wish to know they've visited the page in the last 30 days.
The "and" operation allows you to specify more than one criteria that must be met in order to be included in the segment.
In the first example you gave, at some point in time the visitor saw page A and at some point in time the visitor meet the 30 days threshold. It doesn't matter when the visitor did these two things. It doesn't matter in which order the visitors did these two things.
The "then" operation allows you to specify a sequence that must be met in order to be included in the segment.
In the middle example you gave, the visitor must see page A then the visitor must meet the 30 days threshold
In the last example you gave, the visitor must meet the 30 days threshold then the visitor must see page A
Note: The order in which the visitors did these things matters (unlike with the "and").
I understand the difference between 'And' and 'Then' usually, but what slightly confuses me is that the 30 days dimension seems to completely restrict the segment to only include data within that 30 days, no matter how it's contained.
So I'm wondering if you put Page A 'then' last last 30 days, does Page A sit outside of the last 30 days?
If so, what really is the difference between (Page A 'And' Last 30 days) and (Last 30 days 'Then' Page A) as I get different numbers for all 3 of these segments.