The aim depends on where in the programme you use the method.
How it works
Participants stand in a circle. A participant or a facilitator might offer a statement. The other participants find a position to this statement.
The centre of the circle might be: I totally agree. Who remains there, says, that he or she agrees totally. Who goes outside of the circle says, that he or she is less convinced from the statement.
Another possibility is to use sociometry with other figures, like lines, or maps. In example, ask the participants to build a map with their home cities. Or that they order the group according to the feet size.
Sociometry is a good method for evaluation or for getting to know for each other. It might play with categories and categorizations, give a quick overview over the feelings or evaluations.