Proper implementation for using ETags when making API requests to the Weather.com API involves caching the ETag value received in the response header from the initial request and then including it in the 'If-None-Match' request header for subsequent requests. 'ETags' (Entity Tags) are HTTP response headers that provide a unique identifier for a specific version of a resource. They allow clients to make conditional requests, reducing bandwidth usage by only downloading the resource if it has changed since the last request. When making an initial request to the Weather.com API, the response header should be inspected for an ETag value. This value should be stored locally (e.g., in a database, cache....
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