Automated testing offers numerous advantages over manual testing, making it increasingly popular among quality assurance teams, but not all test suites should be automated due to economic and technological constraints. To determine which tests to automate, several factors should be considered, including the priority of the feature, frequency of test runs, volume of input data, and the need for cross-browser testing, among others. Tests that are high-priority, frequently run, involve large data volumes, or require cross-browser compatibility are good candidates for automation. On the other hand, tests that are run only once, require user interaction, exploratory testing, or visual confirmation are better suited for manual testing. The decision to automate also depends on the team's expertise with automation tools, as these require a certain level of technical skill. Ultimately, the choice to automate should be guided by practicality and the potential return on investment in terms of time and resources.