What is Segment and how to use it?

The segment is a filter or categorization of a contact list, you can create different sub-list or filter it based on multiple filter criteria.

Let's say you have a contact list with 1,000,000 subscribers, and you want to create a sublist specifically for Gmail IDs. Using segmentation, you can create a Gmail segment that filters out all the Gmail IDs from your contact list.

You can give any filter condition as follows.

And now you can send emails to this newly create Gmail segment only instead of the whole list.

You can create any filter based on any conditions such you want to filter all the contacts belong to the India so you can create a segment based on country column i.e Country = India and only send email to Indian users with help of this segment option.

Kindly Note: You must have those columns in your list in order to create a segment for that such as a Country column.