An action plan template is a means of developing a pathway to achieve a specific goal. Physical templates can be purchased or located on the Internet. Most are composed of Excel spreadsheets where you enter interim steps to achieve a particular goal.
The template itself provides guidance and milestones so that you can measure your progress. If you are not achieving the results you want, you can revisit the template to check that you have not overlooked something or misinterpreted what is required.