If you are going to register your CV with Job Boards and Agencies, the best way to get it noticed is through optimal use of keywords.
Put your self in the shoes of a recruiter; they need to sift through thousands, even millions of CVs. The only way to do it is to enter keywords and phrases they think are a good fit for the role and then rely on the algorithm powering the job board or system they are using.
Keyword rich CVs are definitely more effective than regular resumes. Today, recruiters search for CVs using some generic / specific keywords. The systems they use are keyword driven. If your CV carries the particular keyword they are seeking, preferably in the title, your details will be a preferred choice.
The purpose of optimizing your CV is just to get it found, so the best practice is to incorporate the keywords into the title and summary section. Detailed information about qualifications and experience can be provided later.
The main reason to incorporate keywords into the resume is to have as many matches as possible between the resume and the job posting.
A good exercise is to think about the type of role you'd like to be selected for, then draw up a list of skills and attributes that would typically be associated. Then ask yourself, are these represented with prominence in your CV?
The more exact matches, the better, so make sure you have repetition of your desired job title and key experience.