what is JQL and efficient tools to customize dashboards to fulfill business specific requirements?

[Pranjal Arote]

How to customize features available on dashboards as per the need.

How to add additional fields for Example: common/repetitive fields for different projects

[Mark Segall]

Hi @Pranjal Arote and welcome to the community!

I recommend you check out the Atlassian University learning paths:

https://university.atlassian.com/student/collection/850385-learning-paths

[Craig Nodwell]

Hi @Pranjal Arote again welcome to the community.  I couldn't agree with @Mark Segall more on where to up your skills and highly recommend you go there.  I'd also like to know if you could provide more details on your requirement ask.  Are you trying to develop something?  Are you trying to work with what the tools already offer in a more efficient way?  Would you like to modify the UI or it's elements in anyway?
Thanks