Samples are mini versions of products, added for free in a customer's order or given out at events. Their purpose is to popularize a new product or simply get people to try more of your range. It’s a smart tactic to stimulate future orders and customer retention.
Almost any products category can use samples, but they’re especially popular in beauty, food and drink, pet products, personal care. Tailoring samples to be related products or complementary to the ones ordered is a good practice - for example, a sachet of hair mask for the same type of hair the ordered shampoo and conditioner are for.