Start with what you keep doing yourself
The useful question is not what the chatbot can do. It is which part of your day you would like back.
Most people arrive with one of these in mind, turn it on, and add a second one a few weeks later.
Customer support
The questions you answer most, answered from your own pages. AI Chatbot for customer support
Sales
Answers about price and fit while the visitor is still deciding. AI Chatbot for sales
Lead generation
Asks for a name and a contact at the point in the conversation you choose. AI Chatbot for lead generation
Lead qualification
Finds out what someone actually needs before it reaches you. AI Chatbot for lead qualification
Product recommendations
Points people at the right product instead of the catalogue. AI Chatbot for product recommendations