It’s a big question and one which you’ll get different advice on depending on who you ask.
Remember that this is your sales document, so you get to decide. Watch this short video (it’s about a minute) where I tell you how to choose.
Is your CV not getting read? Are you applying for loads of jobs but getting nothing back? It could be as simple as changing the layout.
How your CV looks is actually really important. Given the number of people who apply for any given job, if yours looks scruffy and hard to read, the recruiter or hiring manager will have plenty of others to move...
Most people agree that a good profile serves you well on your CV. Its purpose is to grab your reader’s attention and give them enough information to want to carry on reading down your CV.
It’s a short paragraph of about 5 lines and this 1 minute video explains the key elements of a good profile.