Difference between Upsell, Cross-sell, Downsell - example

What is the difference between Upsell, Cross-sell and Downsell ?

Can you please provide an example of Upselling, Cross-selling and Downselling ?

Upselling and Cross-selling are strategies to earn more revenue from your customers. The difference between them is:

Upselling - is a strategy to sell a more expensive version of a product, that customer already owns or is buying.

Cross-selling - is a strategy to sell an additional or complementary products to customer.

Downselling - consists of offering a lower-tier alternative to avoid a total sale loss. In case of downselling it is better to "sell something" at a lower price, than "sell nothing" and lose a customer completely.