# Introduction to off-chain transactions

**URL:** <https://forum.algorand.co/t/introduction-to-off-chain-transactions/2859>\
**Category:** General\
**Created:** [March 22, 2021, 7:35pm UTC](https://forum.algorand.co/t/introduction-to-off-chain-transactions/2859 "2021-03-22T19:35:43Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![yfmao](https://avatars.discourse-cdn.com/v4/letter/y/c77e96/32.png) [@yfmao](https://forum.algorand.co/u/yfmao)\
**Post date:** [March 23, 2021, 11:37pm UTC](https://forum.algorand.co/t/introduction-to-off-chain-transactions/2859/5 "2021-03-23T23:37:38Z")

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Thanks for your answer @JasonW .

Besides of the off-chain trransactions, I have another quick question about round number. Could you give me the exact definition of the term round number? I am curious about the relationship among round number, blocks and clock time.

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