Leads

Yes, it's done by default. Yes, by activating the "Leads" option in Configuration -> Settings. No, you cannot. Yes, by configuring your Leads in Leads / Settings.

Yes, it will be done automatically when the contact is the same. No, you cannot merge two opportunities together. Yes, Odoo will suggest merging two opportunities from the same contact.

An email address A contact name Both of these answers You don’t need any contact information