HubSuperAdmin

Contacts store information about an individual. From marketing automation to smart content, the lead-specific data found in contact records helps users leverage much of HubSpot's functionality

Companies store information about the organizations that interact with your business. The companies endpoints allow you to manage create and manage company records, as well as sync company data between HubSpot and other systems. 

In HubSpot, deals represent transactions with contacts or companies. Deals are tracked through your sales process in pipeline stages until they're won or lost. The deals endpoints allow you to manage create and manage deal records, as well as sync deal data between HubSpot and other systems.