What is ChatGPT?
ChatGPT by OpenAI is the world's most popular AI assistant. With GPT-4o powering it, it handles text, images, voice, and files. The free tier is genuinely useful; GPT-4o on the paid plan is exceptional for complex tasks.
Best prompting structure
Role
Act as a [specific expert role]
Context
Here is the background: [your situation]
Task
Your task is to [specific action]
Format
Respond in [format: bullet points / table / paragraph]
// Example prompt
Act as a senior copywriter. I am launching a fitness app for Indian women aged 25–40. Write 5 Instagram captions that are motivational, conversational, and end with a CTA. Format as a numbered list.
How to use ChatGPT — step by step
1
Open chat.openai.com and start a new chat
2
Set context with a role prompt at the start
3
Ask your main task clearly and specifically
4
Follow up to refine — treat it like a conversation
5
Use "Regenerate" if the output misses the mark
Pro tips
Always give ChatGPT a role — "Act as a..." dramatically improves output quality
Use the Custom Instructions feature to set your background permanently
For coding, paste the error message directly — it fixes bugs accurately
GPT-4o can read PDFs and images — upload files for analysis