Branch Coverage is a software testing metric that measures whether each possible branch in a program's control flow has been executed. This includes evaluating the outcomes of conditional statements, such as if and switch statements. Achieving full branch coverage ensures that all paths through the code are tested, which helps identify potential errors. To implement branch coverage, testers create test cases that specifically target different outcomes of each conditional. By doing so, they can confirm that the program behaves as expected under various scenarios. This approach enhances the overall quality and reliability of the software being developed.