Cross-selling is when you suggest more products to a customer who's already buying. The goal is to increase the sale value and help the customer more.
In business sales, this often means offering related products that can help the client. For example, if you sell software, you might also offer training.
Good cross-selling needs you to understand what the customer needs. It's not about pushing extra stuff. It's about creating more value.
Data helps with cross-selling. By looking at what customers buy, you can suggest better options. Many sales tools have features to help with this.
When done right, cross-selling can make more money and make customers happier. But always put the customer's needs first to keep their trust.