Lightning Web Component can get Salesforce Data using a reactive wire service built on Lightning Data Service.
Each value in the immutable stream is the newer version of the value that precedes it.
Wire Service is a reactive service because it supports reactive variables which are prefixed with ‘$’. If this reactive variable changes, the reactive wire service provisions new data instead of making a new server-call.
If the stream has been changed, the component will be re-rendered as per reactive process.
Please see the following image carefully to understand the Wire Service Methodology with Syntax
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