> For the complete documentation index, see [llms.txt](https://doc.ave.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.ave.ai/vn/huong-dan/app-use-tutorial/beginners-guide-how-to-top-up-gas-fee-on-ave.ai.md).

# \[Beginners Guide]How To Top Up Gas Fee On Ave.ai

**What is Gas Fee?**

Gas fee is for the cost that certain blockchain protocol users pay to network validators they wish to perform a function on the blockchain.

On the Ethereum blockchain, you need ETH to pay for gas fees. You need BNB, the native cryptocurrency of Binance Smart Chain for gas fees.

<figure><img src="/files/LHN1OT9wt0hur4bcCMRA" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/0s1zA5zhsL23V4ujNwHR" alt=""><figcaption></figcaption></figure>

Check the YouTube video here：<https://www.youtube.com/watch?v=ufIKKaybL0E>

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