The phrase "to make something effective" means to take action or make changes that will cause something to work well, be successful, or achieve its intended purpose. Full definition
They are low in calories and high in antioxidants, making them effective for weight loss. (detoxdiy.com)
These types of courses have you read and listen to examples of communications and analyze what makes them effective in various settings. (campus-to-career.com)
Because you're not working in an office, you have to consider your skills in terms of what makes you effective on the field. (resume-now.com)