What are some examples of complementary goods and how do they impact consumer behavior?

Complementary goods are products that are used together, such as peanut butter and jelly or video game consoles and Video Games. When the price of one complementary good changes, it can impact the demand for the other. For example, if the price of video game consoles decreases, consumers may be more likely to purchase video games to go with them. This can lead to an increase in overall sales for both products.