"AI assistant" gets used loosely. The useful definition: a chatbot answers whatever you type, while an assistant is set up once, with your context and instructions, to do a specific job well every time.
Chatbot vs assistant
Ask a raw chatbot to "write a client update" and you re-explain your business every time. An assistant already knows your tone, your clients, and your format, so you only give it the new facts.
What makes an assistant
Three things: standing instructions (who it is, how it writes), your context (documents, examples, rules), and a clear task it repeats. Tools like Claude's Projects let you save all of this so it carries across chats.
Start with one job
Pick one recurring task you dislike, such as weekly reports, inbox triage, or meeting notes, and build an assistant for just that. Get it right, then add the next.
By the end of AI 101, every student has built their own reusable assistant for their real work. That is the graduation project.