Relationship Types allow you to define different the types of relationships between members.  These are usually used to link family members.

Select Relationship Types from the Site Configuration menu to go to a screen like the one shown at right:

Some types of relationships - like "parent / child" require a different word to describe each person's role in the relationship.  You will need to define these types of relationships twice, as you see in the example here.

However, if the same word describes both persons in a relationship, you should only define that relationship once, as you can see we've done for the "spouse" relationship.

Click Update to update a relationship, as shown below.