# Glossary

**APR:** Annual Percentage Return.

**Collection:** A set of NFTs within the same contract.

**Collection Offer:** An offer which gets submitted on all items within a collection.

**Contract:** An U2U smart contract

**Floor Price:** The lowest amount of money required to spend to obtain an NFT using the *Buy Now* function.

**Gas:** The cost required to perform a transaction, priced in U2U.

**Launchpad:** Igniting the Future of Digital Collectibles.

**Royalties:** Fees which are paid to collection owners upon each trade done on X721 Marketplace.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.x721.io/guides/faqs/glossary.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.