the 3 icons on the npc when talking to them....

[FilthFace]

what do they mean? the orange, green, and red.

[Sheetso]

Stats - Respect (Thumbs Up) affects how many grams a customer will buy, the likelihood a customer will buy Merch from your displays, and increases the price paid per gram when selling outside of your shop.

Stats - Loyalty (Green Arrow) goes up each time you make a deal with a customer. The higher this value is, the more likely the customer is to buy Merch from your shelves. It also increases the price paid per gram when selling outside of your shop. Note, you also need a few points of loyalty to get a customer into your store for the first time.

Stats - Addiction (Smiley Face) affects how many grams a customer will buy.

You can read/find all this information in stoney´s guide on the guide page