Monitoring and sending health reports of your application is essential, as it helps to figure out or detect when and where there is an issue with your application quite early. It provides real-time updates if the application is running or not. This can be instrumental in reducing application downtime. The Spring Boot Actuator project provides several capabilities that allows developers to trace when things go wrong on their application, such as health check, metrics, logging, and auditing. By default, Spring Boot Actuator provides endpoints that can be exposed via HTTP or JMX to allow you to monitor your application. To enable the Spring Boot Actuator endpoint over HTTP, you need to configure the spring-boot-starter-actuator dependency in your pom.xml file with management.endpoints.web.exposure.include=* and management.endpoints.web.exposure.exclude=. You also need to add Postgres configuration to connect to a database, such as PostgreSQL. The health status of the application can be checked using the actuator/health endpoint. To get more details on the application's health, you can enable the DiskSpaceHealthIndicator class by adding management.endpoint.health.show-details=always in your application.properties file. You can also receive a Spring Boot Actuator response within your application by calling the health web endpoint and parsing the output to where you need it either using the RestTemplate or HttpClient. The aggregated health status of your Spring Boot application can be obtained by creating a bean with a property of type HealthEndpoint, creating a constructor to initialize it, and a getStatus method that returns the status of the healthEndpoint. To integrate Twilio into the Spring Boot health monitoring app, you need to add the Twilio dependency to your pom.xml file, get your Twilio credentials, create a config package to configure your Twilio properties, and create a service folder with an interface and a concrete class that implements it. The controller is responsible for handling HTTP requests and sending responses. To test the application, run the command in the terminal: mvn spring-boot:run, launch Postman, log an activity by making a POST request to "http://localhost:8080/api/v1/timeManager/log", and verify the result of this is sent to the WhatsApp number as shown above.