What parameters do you rely on when choosing tests for automation?

When selecting tests for automation, I consider the following parameters:

• Frequency of use of the functionality: I automate tests for frequently used and critical functions.
• Stability of the functionality: I choose tests for parts of the application that change rarely to minimize maintenance costs.
• Repeatability: Tests that need to be run multiple times (e.g., regression tests) are suitable for automation.
• Difficulty of manual testing: If manual testing takes a lot of time or is prone to errors, it should be automated.
• Impact on business: Tests that verify key business processes are prioritized for automation.
• Automation feasibility: Some tests are difficult or impossible to automate (e.g., visual checks), and I select them cautiously.

Thus, I automate those tests that provide the maximum benefit in terms of time savings and quality improvement.