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A small business website needs enough information to help a suitable customer understand the offer and take the next step. There is no universal page count. Build the structure around real questions rather than filling a menu with pages that repeat the same introduction.
Start with the essential decisions
Your homepage should explain what you do, who you help and where the visitor should go next. A service page should describe the problem, deliverables, scope boundaries and enquiry route. An about page can establish who is responsible for the work. A contact page should make reaching you straightforward.
Evidence matters too. This might be a project gallery, a carefully written case study or a product example. Avoid adding testimonials or results you cannot substantiate. Use an honest description of what a project demonstrates.
Split a page when the need is different
A website design customer and a WordPress repair customer may have different questions. Separate service pages can help each understand the offer. By contrast, five near-identical pages with different town names add little useful information.
For example, a repair page can explain the initial diagnosis, the information needed and how access is arranged. A new website page can focus on content, page structure and launch responsibilities. Each earns its place by helping a distinct decision.
Make the structure easy to follow
Use descriptive navigation labels and connect related pages in the body copy. A project page should link to the relevant service, while the service can point to an example. Important pages should not rely on a sitemap alone for discovery.
See my service overview, portfolio and project enquiry page for the roles those pages play. For the traffic question, read Will more service pages bring more search traffic?. For deciding what to write before development starts, see How do I write a website brief a developer can quote accurately?.
Before adding a page, write its purpose in one sentence. If you cannot explain the separate customer question it answers, consider improving an existing page instead.