What is better to use, the workflow or the process builder in Salesforce?

Process builder is advance version to perform automation tasks in Salesforce.

In workflow we can only perform 4 actions but in process builder we have more actions like creation of record, submit for approval etc.

Process builder is better to use because in process builder we can have multiple if then statements to perform our task.

If we have to send outbound message then we can’t use process builder. This action is present in workflow.