Insert UUID GEN 4 Value

Hi,

I would like to know how to properly use uuid_generate_v4 when inserting data into PostgreSQL table.

When I run the command select * from pg_available_extensions;

I can see this uuid-ossp          | 1.0             |                   | generate universally unique identifiers (UUIDs)

I am trying to find a basic and easy to understand documentation of it on how to use when inserting data because I have a column that is a uuid type.

Thanks,

J