What is wire decorator in LWC?
it's use cases?
How to use wire decorators by calling apex class or server side controller?
How to use wire decorator without any server side controller?
Systematic guide how to go through the available resources in trail head and developers' guide
Important links:
https://trailhead.salesforce.com/content/learn/modules/lightning-web-components-and-salesforce-data/use-apex-to-work-with-data
https://developer.salesforce.com/docs/platform/lwc/guide/reference-update-record.html
