What you write here is totally up to you, there is no right or wrong way to complete your 'About Us' page. We advise making your language friendly and approachable, while being informative and professional.
You should also consider adding key information such as:
How many years experience you have
Your skills
Your qualifications
Your contact details
Local areas you cover
Your policies
Your policy on repairs/returns
Any additional services you offer
Why people should choose you