The document discusses the importance of consistency in website design. Consistent branding and layout across a website creates familiarity for visitors and reinforces the brand identity, making it easier for visitors to navigate. While some flexibility is allowed, like different layouts for product and article pages, key elements like the navigation menu, search, and newsletter sign-up should remain in the same position on all pages. Maintaining consistency lowers development costs and helps keep visitors on the site longer to increase things like ad revenue and lead conversion.