what are Rest Resources in salesforce?

Hi Vikas,

A REST resource is an abstraction of a piece of information or an action, such as a single data record, a collection of records, or a query. Each resource in REST API is identified by a named Uniform Resource Identifier (URI) and is accessed using standard HTTP methods (HEAD, GET, POST, PATCH, DELETE). REST API is based on the usage of resources, their URIs, and the links between them.

For more info follow this link:

https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/intro_rest_resources.htm

Thanks