CRM stands for customer relationship management, but the simplest way to think about it is a shared memory. Instead of customer details living in one person's phone, inbox and head, everything sits in one place the whole team can see.
For a small team, that solves real problems. No more "who was talking to this client?" or leads forgotten in a chat. You can see every contact, what was promised, what's due next, and who's handling it.
A CRM doesn't have to be heavy. The best one for a small team is the one that matches how you actually work, with just the fields and steps you need, not a giant system built for a corporation.
The real value shows up when someone is away or a customer comes back after months. The history is there, so anyone can pick up the relationship without dropping the ball.