Module 3 · Files, tools and your own data Lesson 9 of 15
Custom GPTs and Projects — ChatGPT's own feature
A Custom GPT is a saved assistant with your own instructions, your own files and its own name. A Project is the same idea inside your account: a space where every conversation shares the same context. Either one turns a clever answer into a system you can reuse.
The concept
The reason this is the feature worth learning is that it moves your context out of the message box and into the tool. Every prompt you write then gets shorter, because the model already knows who you are.
Write three to eight instructions, in the imperative, covering: who you are, what you are working on, what the assistant should always do, and what it must never do. Upload the two or three files you always end up pasting. Then use it for a week and delete any instruction that never changed an answer.
Here is the shape of it, in the form you will actually use:
Name: Placement Prep
You are my placement coach for the 2026 hiring season.
WHO I AM
I am a final-year B.Com student targeting entry-level data analyst roles in India.
I have Excel, basic SQL and one dashboard project. No internship yet.
WHAT YOU ALWAYS DO
- Ask me for the job description before giving advice about an application.
- Give answers as short bulleted lists, never essays.
- Tell me what is weak about my draft before telling me what works.
WHAT YOU NEVER DO
- Invent companies, dates or statistics.
- Praise a draft you would not send yourself.Common mistakes
The mistake is writing the instructions once and never revising them. A Custom GPT is a prompt you edit, and the edit is where the value comes from — after two weeks you will know exactly which instruction was doing nothing.
Worked example
A "Placement Prep" Custom GPT holding your resume, three job descriptions and your college calendar answers "what should I do this week" with your actual dates in it.
Your practice task
Build one Custom GPT with three instructions and one uploaded file, give it a name, and use it three times this week. If you stop using it, its instructions were too vague.
Do this before moving on. Reading a solution teaches the shape of it; typing it teaches you.
Key takeaway
The reason this is the feature worth learning is that it moves your context out of the message box and into the tool.
Keep your place in this course
A free account saves which lessons you have finished and unlocks the certificate. The lesson itself stays free to read.
Create free account or sign inCourse complete
You finished every lesson.
Your certificate is ready, and the projects you built are the proof to attach to an application.
Almost there
15 lessons left of 15
Finish every lesson to unlock the certificate. Each one ends in a practice task — do them and the final project brief writes itself.