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20 lines
731 B
Markdown
20 lines
731 B
Markdown
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contentType: overview
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---
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# Data
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Data is the information that n8n nodes receive and process. For basic usage of n8n you don't need to understand data structures and manipulation. However, it becomes important if you want to:
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- Create your own node
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- Write custom expressions
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- Use the Function or Function Item node
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This section covers:
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* [Data structure](/data/data-structure/)
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* [Transforming data](/data/transforming-data/)
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* [Process data using code](/data/code/)
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* [Pinning](/data/data-pinning/) and [editing](/data/data-editing/) data during workflow development.
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* [Data mapping](/data/data-mapping/data-mapping-ui/) and [Item linking](/data/data-mapping/data-item-linking/): how data items link to each other.
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