Disabling promotional emails can be done on the emails themselves through the unsubscribe link at the bottom of the emails. You can also follow the steps in the link below to stop receiving our emails.
Desktop: https://support.google.com/mail/answer/1366858?co=GENIE.Platform%3DDesktop&hl=en&oco=2
Android: https://support.google.com/mail/answer/1366858?co=GENIE.Platform%3DAndroid&hl=en&oco=2
iPad/iPhone: https://support.google.com/mail/answer/1366858?co=GENIE.Platform%3DiOS&hl=en&oco=2
For other email platforms you can search for "Mark emails as spam" alongside the name of your email provider.