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vigneshwar kothavigneshwar kotha 

what is heroku ? How It is Useful ?

Please May i know what is heroku ? How It is Useful ? 
pconpcon
Heroku is a PaaS (Platform as a Service) that allows you to run your own code on someone elses servers.  They offer scaling and other features on the platform as well.  You can take a look over these modules [1] [2] for more information.

[1] https://developer.salesforce.com/trailhead/module/heroku_enterprise_baiscs
[2] https://developer.salesforce.com/trailhead/module/salesforce_heroku_integration
DeepthiDeepthi (Salesforce Developers) 
Hi Vigneshwar,

Heroku is a cloud application platform – a new way of building and deploying web apps.This lets app developers spend their time on their application code, not managing servers, deployment, ongoing operations, or scaling.
Heroku is developed on open source technologies like Ruby, Node, PHP, and Python.

Try to check the trailhead modules on heroku for more understanding.
https://developer.salesforce.com/trailhead/en/trail/heroku_enterprise 

https://developer.salesforce.com/trailhead/en/project/quickstart-heroku-connect 

Hope this helps you!
Best Regards,
Deepthi