As I previously mentioned, the professional summary is one of the most important parts of your Resume. This is where you get to engage the employer – recruiter, the reader to continue to check your Resume.
Here are some tips on "How To":
Keep it brief
A few sentences long. You want to make sure that you’re getting your point across without boring the employer or including too much information.
Highlight your relevant qualifications and certifications
This is your chance to catch the employer’s attention and let them know you have the skills and experience they’re looking for.

Use strong and active language
Use language that is strong and specific. For example, don’t say, “I am experienced in customer service.” Instead, say, “I have five years of experience providing excellent customer service, with a satisfaction rate above 90%.
Facts, Facts
Do not waste space telling how good a team player you are. Instead, grab the biggest or latest and most relevant achievement you have achieved and write about that and be specific.
Don't be shy!
Many times, I hear that from clients -” o, I don’t think this is important, but I have certification in X and Y, and I did something unique there.” Mention everything relevant.

Plan it
Take time, sit down and list your knowledge and experience. Do not write your professional summary right away. First, collect all the details. Then sit back, take a break, walk, go back, check an advertisement you want to apply for, check your list, find the common parts, and then create/write your summary that fits the job ad and your experience.
A well-written professional summary is an essential part of any resume. By following these tips, you can make sure that you write a better professional summary than before!