Once you have identified the keywords that ATS is looking for, you need to optimize your resume by using them strategically and effectively. To do this, incorporate keywords throughout your resume, particularly in the summary, skills, and work history sections. However, be careful not to overuse or stuff keywords as this may look unnatural or spammy to ATS or human recruiters. Additionally, use keywords in context and provide examples or achievements that demonstrate your skills and value. Make sure the keywords you use are relevant and specific to the job and industry. For instance, if you are applying for a marketing job, use keywords such as "SEO", "content creation", or "social media" rather than generic terms such as "communication" or "creativity". Also, ensure that the keywords match the exact wording and spelling of the job description. For example, if the job description asks for "Microsoft Excel", do not write "MS Excel" or "Excel" on your resume as ATS may not recognize them as the same thing.