Examples:
* When you ask for recommendations, it gives you x branded option or maybe the "best result" with an advertised alternative.
* When you search for symptoms, it recommends name brands instead of generics.
* When you ask for recipes, it directs you to <advertised cooking site>.
* When you ask for poetry in the style of Longfellow, it recommends an audiobook as "something you might enjoy".
* When you want to know about what happened to <recent celebrity that died>, it says "they died in a high speed chase according to <celebrity rag>. Here are some pictures and links to an article with more information"
* Platform integrations, like linking to the Google/windows store directly.
Many of these are already done by primitive assistants like Alexa. Going beyond that, you can copy pretty much everything done by influencer marketers in a chatbot.