Contacts can be added to groups on the Samsung device. The group can be used to send group messages and group emails to the members of the group. You can also assign a ring tone to the group.

Android 10 (One UI 2.0)
Step 1:  Open the  Contacts -App
Step 2:  Open the  menu
Step 3:  Tap on  Groups
Step 4:  Tap on  Create group
Step 5:  Enter a  Group name
Step 6:  Tap on  Add member
Step 7:  Select all desired  contacts
Step 8:  Tap on  Done
Step 9:  Tap on  Save
  1. Open the Contacts-App
  2. Open the menu
  3. Tap on Groups
  4. Tap on Create group
  5. Enter a Group name
  6. Tap on Add member
  7. Select all desired contacts
  8. Tap on Done
  9. Tap on Save

Samsung Instructions