The contacts in Deskera’s CRM software means the lists of the prospects you gained from various resources. Not all your contacts are deals because some of the contacts you have might not show any interest in buying your products and services.
Your contacts are like a list of phones directory. They are just a list of numbers and pieces of information about your prospects and existing customers.
On the other hand, a deal is a sales opportunity. Whenever your contacts show some interest in buying your goods and services, you may convert them into deals.