# Indexer

Nosto module uses Magento 2 indexers for sending product updates to Nosto via API. The indexer behaviour varies quite a bit depending on your module version. Please refer to the corresponding module version for indexer instructions and troubleshooting.

[For version 7.x](https://docs.nosto.com/magento-2/features/indexer/on-7.x)

[For versions 5.x](https://docs.nosto.com/magento-2/features/indexer/on-5.x-and-6.x)[ and 6.x](https://docs.nosto.com/magento-2/features/indexer/on-5.x-and-6.x)

[For versions 4.x](https://docs.nosto.com/magento-2/features/indexer/4.0.0-less-than-5.0.0)

[For versions 3.x](https://docs.nosto.com/magento-2/features/indexer/legacy-indexer)