The Equal to operator is used to select all those contacts that exactly match the value entered in the condition input field.
Setting the First Name condition to Equal to, with Sam as the input field value, selects all those contacts whose first name is exactly Sam. Contacts whose first name is, for example, Samantha or Sammy are not selected.
The Equal to operator can also be applied when multiple values are set for a given attribute. It is used to select those contacts for which the relevant attribute has a value that exactly matches at least one of those entered in the condition input field. In this instance, the Equal to operator applies to string data types only.
See Input field types for more about each input field.