# What is service worker and how do I add it in order to utilise the network optimisation feature?

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##### Post Metadata
- Posted at: about 6 years ago
- Author title: Blog Coach | See a Man About a Blog. Blogging, Social Media & Internet Marketing Tips



## Comments
### Comment 1

A service worker can be considered as a Javascript that runs in the background in a browser and can determine the user's network and intercept the requests going out from the browser. 

By installing a service worker, and loading the network-optimization plugin provided by ImageKit, the image requests get intercepted and their URL is modified to the right quality level depending on the user's network.

You can read more about installing a generic service worker here - https://developers.google.com/web/fundamentals/codelabs/offline and about adding ImageKit's network-based optimization plugin here - https://docs.imagekit.io/features/network-based-image-optimization

##### Comment Metadata
- Posted at: about 6 years ago
- Author title: Hiring across sales, marketing and tech | Co-Founder at ImageKit.io




## Related Product
[ImageKit](https://www.g2.com/products/imagekit/reviews)

## Related Category
[Digital Asset Management](https://www.g2.com/categories/digital-asset-management)

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