"How does content help my business, and why should I spend time doing it?"
There's a number of benefits. Firstly it helps to keep in touch with your client base on regular basis, and keep your site fresh which is important for SEO to maintain your search position in Google.
Your blog can feature answers to the most common questions from your clients, educational posts about the work you do or the problems your clients may face related to the services you offer or images through social media such as Facebook, Twitter or Instagram, depending on what platform best fits the type of business you have. Up-to-date industry related posts that inform, educate and entertain readers, lead to an increase in social media engagement, improve your online reputation and give you authority.
When clients and potential customer search online for information that you have blogged about, they perceive you a trustworthy expert, and are more likely to book an appointment with you over an unfamiliar competitors.