Apply suggestions from code review

Co-authored-by: Pierangelo Di Pilato <pierangelodipilato@gmail.com>

Author: Leo6Leo

docs/bookstore/page-0/page-0-intro.md

@@ -53,7 +53,7 @@ The bookstore application consists of a few components.
 
 ### User Interface
 
-A simple frontend Next.js application that interacts with these services. It could be a web page where users can select a book to view its details, ratings, and reviews.
+A frontend Next.js application that interacts with these services. It is a web page where users can select a book to view its details, ratings, and reviews.
 
 ### Database Service
 
@@ -91,7 +91,7 @@ We will be building the sample app in this order:
 
 1. **Implement Book Review v1**: Pass reviews from the frontend to event-display via broker. This involves learning about Broker, SinkBinding, and CloudEvents event types.
 
-2. **Deploy Sentiment Analysis Service**: Gain knowledge on deploying a sentiment analysis service using Knative Func.
+2. **Deploy Sentiment Analysis Service**: Gain knowledge on deploying a sentiment analysis service using Knative Function.
 
 3. **Deploy Bad Word Filter Service**: Learn how to deploy a bad word filter service using Knative Service and Sink.
 

docs/bookstore/page-1/pg1-review-svc-1.md

@@ -38,7 +38,7 @@ The book review service is our Node.js API server, playing a crucial role in our
 
 Before we dive into the code, let's clarify two important concepts: Broker and SinkBinding. It’s okay if you don’t fully understand it yet! You will get a deeper understanding along the way.
 
-- **Broker**: Acts as the central point in the event-driven architecture, routing events to the correct destinations. The broker's address is not fixed and can change dynamically.
+- **Broker**: Acts as the central point in the event-driven architecture, routing events to the correct destinations. The broker's address is not fixed and can vary.
 - **SinkBinding**: This Knative Eventing component automatically injects the broker's address into the environment variable `K_SINK`, ensuring that the Node.js server always has the correct address without manual updates.
 
 ![Image](images/image12.png)