Local brick and mortar businesses need a website, as without one they do not exist for many people. Without a website, their businesses are controlled by social media. Rankings in search engines may suffer. Businesses without websites miss new customers every day.
With a website, business people influence how they are seen online. They improve their chances with search engine rankings, meaning more people will see their site, possibly visit it, and maybe walk through the door and become a customer.
Custom websites start with thorough advance planning to achieve an end product that is more likely to perform, leads to a website that stands out in a crowded field, teaches other things needed after launch - like social media or internet marketing - and continues with updates afterward by the client or the company, so the website is never out of date.