Extent Reports are graphical reports, which are a graphical presentation of the Automation Run. 

The following screenshot is a sample extent report. A tidy report displaying the number of tests passed is displayed:

To use Extent Reports, add the following dependency in pom.xml, as shown here:

<!-- https://mvnrepository.com/artifact/com.aventstack/extentreports -->
<dependency>
 <groupId>com.aventstack</groupId>
 <artifactId>extentreports</artifactId>
 <version>3.1.5</version>
 <scope>test</scope>
</dependency>

Follow the following steps to download the Extent Report Jar:

1. Save the pom.xml
2. Right click on Project
3. Click Maven | Update Project

Alternatively, the Extent Report jar can be downloaded from http://extentreports.com/community/ (click on the Java 3.1.5 link).