Every AND condition must be met for each contact this is available in that smart list.
Example: Contacts with a specific tag also having both an email AND a phone
At least one OR condition must be met for each contact that is available in that smartlist.
Example: Contacts having either an email OR a phone OR having a certain tag.
Groups of AND filters can be used with the OR condition among them for higher customization in filtering.
Example: Contact having both an email AND phone OR just an address
