"To apply this method" is a phrase that means using a particular approach or technique to solve a problem or achieve a goal. It suggests taking action or implementing a specific process or strategy. Full definition
How can business leaders understand and apply the methods of designers that have become indispensable for leading large organizations in the modern age? (fortuneconferences.com)
Keep in mind to consult a doctor before applying any method in this article because the baby's skin is very sensitive. (vkool.com)
They fear that attempts to produce «designer babies» by applying the methods to embryos will create a backlash against all use of the technology. (scientificamerican.com)