Your domain is part of your business identity. A good address is easy to say over the phone, spell on an invoice and remember after a customer sees your van or social post.
Keep it short and recognisable
Use your established trading name where possible. Avoid long strings of service keywords, hyphens that are difficult to explain, unusual spellings and numbers that customers may forget. If your name is common, consider a simple, distinctive addition that still matches your real business.
Check the details before you buy
Search for similar businesses and check that the name does not cause confusion. Review the registrar's renewal price, transfer terms and account security options. If a web designer registers the domain for you, make sure your business retains access and ownership.
Consider whether the domain will still fit if your services or working area change. A name tied too tightly to one town or one narrow service can become awkward if the business grows.
Use the domain consistently
Put the website address on your quotes, invoices, vehicle branding and business profiles. Use a professional email address on the same domain if that suits your setup, and keep the website secure and renewed.
A domain alone does not create search visibility. Build helpful service pages and keep contact details accurate. Google's SEO Starter Guide explains why descriptive, useful site content matters more than keyword tricks.