The phrase "to include an objective" means that you need to add a specific goal or aim to something you are working on, so that you have a clear purpose or target to achieve. Full definition
The purpose of including an objective statement in your resume helps you eliminate irrelevant information that will not help you get the job that you're seeking. (exclusive-executive-resumes.com)
This piece of advice is still somewhat controversial, but in most cases, we recommend that you do not include an objective on your resume. (distinctiveweb.com)
Note that we do not include an objective in the vast majority of our resume examples. (resume-resource.com)