1. ChatGPT, developed by OpenAI, is a general-purpose AI chatbot that uses LLM technology to generate text after a prompt and was released for public use on November 30, 2022. There are free and paid versions of ChatGPT, with the most recent model being GPT-4o.

2. The chatbot can be used for various purposes, such as programming, scripts, email replies, listicles, blog ideas, summarization, etc., as well as advanced use cases like debugging code, scientific concepts, and complex problem solving. However, it lacks context awareness and may not always generate appropriate code for specific contexts.

3. While ChatGPT can write workable Python code, it cannot program an entire app's worth of code. There are character limitations after around 500 words, but there is no documented character limit.

4. Users can save chats in the ChatGPT interface and request deletion of AI-generated references about them through a web form entitled "OpenAI Personal Data Removal Request." However, OpenAI may not grant every request due to balancing privacy requests against freedom of expression.

5. There are multiple AI-powered chatbot competitors, such as Together, Google's Gemini, and Anthropic's Claude. Developers are also creating open-source alternatives.

6. ChatGPT has been accused of generating false claims (e.g., accusing an individual of a crime they didn't commit) and producing misinformation, leading to controversies, such as defamation lawsuits and school systems banning its use. There are also concerns about plagiarism due to the AI's ability to generate text.

7. Marketplaces host and provide ChatGPT prompts for free or a nominal fee (e.g., PromptBase, ChatX). There are tools to detect ChatGPT-generated text, but they are inconsistent at best.