When a contact person is added, it is easy for your partners to contact the right person in your organisation.
To add a contact person for your company
Click the 3 dots in the left corner where your name is.
Choose "My Organization".
Go to the "Company details" tab.
Scroll down to the section "Contact Person" (not to be confused with Product Contact, Financial Contact etc).
Add the new contact person there. Be aware you can only add already existing teammembers. If the contact person is not on the list, you have to add them (guide)