When you create a filter, you can specify as many attribute-value pairs as you want. Each pair is a filter criterion. There is one filter per view. See GUID-37736733-2FD3-4AA6-9907-606BE67FDA3E.html#GUID-37736733-2FD3-4AA6-9907-606BE67FDA3E___OP_EXAMINING_NOTIFICATIONS_69712 for an example.
To pass a filter, notifications must satisfy all conditions in at least one Sheet tab:
In a Sheet tab, criteria are related to one another with a logical operator AND. To satisfy a given tab, notifications must satisfy all conditions specified in the tab.
Individual Sheet tabs are related to one another with a logical operator OR. Notifications must satisfy the conditions in at least one tab.