Last week I wrote about the process of a ritual. I mentioned different types of rituals. Of course there are many ways to classify rituals, with types and subtypes. Generally speaking there are three types: initiation, transformation and confirmation.
Initiation rituals are rituals that welcome a person in to a group. Almost every social group has a type of initiation ritual. For adults you have to prove or promise something. Another type is for babies. In some religions babies have to be baptised or circumcised. This defines the baby as part of a group, it is welcomed. Cultures also have initiation rituals. For example, when a baby is born, families come to visit or baby shower are thrown.
Initiation rituals can be some form of transformation rituals. It's a special type, because it has to do with becoming part of a social group. Transformation rituals help individuals to transform from one phase of life to another. For example marriage help transform from a single life to married life or other rituals guide a person from being a child to being an adult. Another example are burials, those rituals help people to transform to a life without a loved one.
The third type of rituals are confirmation rituals. These rituals are performed to confirm that a person is part of a group. For example rituals that confirm that you are part of a country (pledging to the flag) or the rite of the last supper or communion that from time to time confirm that a believer is part of a religious tradition.
As I already wrote: there are a lot of ways to classify rituals, but these generic three categories may help you recognise the general use of a ritual.