Including test automation in development is vital for enhancing the efficiency and accuracy of software testing. Automation speeds up the execution of tests, allowing for more comprehensive coverage and quicker feedback loops. This process reduces human error, ensures repeatability, and enables teams to focus on complex test scenarios that require creativity and critical thinking. It also supports agile development practices by facilitating continuous integration and deployment. Ultimately, test automation contributes to higher quality software and quicker time-to-market.