The white paper is an official document published by a cryptocurrency project team to explain the project's idea in detail.
Serves as a guide for investors and developers to understand what the project offers and why it is different.
Typically includes:
The problem that the project aims to solve.
The proposed solution using blockchain or currency.
The mechanism or technology it relies on.
Token details (Tokenomics): such as distribution, total supply, uses.
The roadmap for what will happen in the future.
Sometimes information about the founding team and advisors.
Simply put: the white paper is the document you read to decide if this project is worth your trust and money, or just a marketing illusion.