Segmate allows you to filter your subscribers based on certain criteria. You can build more complex segments by utilizing the "Conditions" parameter.

Take the following example in the screenshot below.

In this example we are using the "And" Condition. This means the following filter set would filter where the:
TAG is "beta webinar" AND SEQUENCE is "Chatbox Course" AND LAST INTERACTION after 17-10-2.

If we used the "OR" Condition with the same filters applied, we would get:
TAG is "beta webinar" OR SEQUENCE is "Chatbox Course" OR LAST INTERACTION after 17-10-2.

So by using the "OR" Condition we should get more subscribers in the result set. Using "AND" will create a much more segmented list of subscribers.