Can I create triggers in the database?
If the Setup Screen tells you that the database settings are correct, it means you can login into the database with the username and password that you entered. However, it does not guarantee that the MySQL database user has enough privileges to perform all necessary database actions.
CiviCRM needs trigger support and in the System Administrator Guide at https://docs.civicrm.org/sysadmin/en/latest/requirements/#mysql-permissions is described what this entails.

If you are not able to grant the correct privileges in the control panel of your internet service provider, you have to contact their service desk.