Before importing contacts for the first time, you need to think about how to manage your contacts and how to work with them most easily and best in the future. Even if you are in a hurry to import, it is good to really take a few minutes for the first import. Here's a step-by-step guide to creating a contact list, importing contacts, and segmenting them:
Import contacts into the created contact list.
Don't want to send the campaign to the entire contact database? Create a segment (filter) to which you will submit the campaign.
3. Create a segment from the entire contact database.
Forgot to import some contacts? Or did you forget to import your name, surname, etc.? Does not matter. Import the contacts into the same list again. This will not create duplications! You can learn how to update your database here.
You can now start creating your campaign.