ORIGINAL:
AWS WAF is a web application firewall that lets you monitor the HTTP(S) requests that are forwarded to an Amazon CloudFront distribution, an Amazon API Gateway REST API, an Application Load Balancer, or an AWS AppSync GraphQL API.
AWS WAF also lets you control access to your content. Based on conditions that you specify, such as the IP addresses that requests originate from or the values of query strings, the service associated with your protected resource responds to requests either with the requested content or with an HTTP 403 status code (Forbidden). You can also configure CloudFront to return a custom error page when a request is blocked.
REWRITE:
AWS WAF is a web application firewall that lets you monitor the HTTP(S) requests that are forwarded to your Amazon CloudFront distribution, Amazon API Gateway REST API, Application Load Balancer, or AWS AppSync GraphQL API.
With AWS WAF, you can control access to your content. By specifying conditions, you determine whether your protected content is delivered or an HTTP 403 status code is returned. Those conditions can include originating IP addresses or query string values. Your CloudFront distribution can be configured to return an error page when a request is blocked.
EXPLANATION:
The use of the word “your” makes the first paragraph warmer and more engaging. Whenever a service belongs to a user the word “your” should be considered.