A multi-page website is exactly what it sounds like: a site built from several separate pages, each living at its own address, that the browser loads one at a time as a visitor clicks around. Home, About, Services, Pricing, Contact, each is its own document.
Compare it to a book with chapters versus a single long scroll. In a book you flip to the chapter you want and the rest stays out of the way, so finding things is straightforward and each chapter can stand on its own. A multi-page site works like that, while a single-page website keeps everything on one continuous scroll. The book model gives you a clean navigation structure and a separate URL for every topic.
That separation matters for search. Each page can target its own keyword, earn its own backlinks, and rank on its own, so a five-page site gives Google five doors in rather than one. The trade-off is a tiny pause when each page loads, though modern hosting and caching make that barely noticeable.
There is a practical upside too: a multi-page layout scales without becoming a mess. Adding a new service or blog post means a new page slotted into the menu, not another section crammed onto an already long scroll. It also makes analytics far easier to read, since every page view maps to a real address you can track, rather than one URL that has to log scroll depth to tell you anything.
At TopDevs we default to a multi-page structure for most business sites, because clear sections rank better and make it obvious where every piece of content belongs.