Sites avec Management du Contenu (CMS)
Content management systems produce web pages on demand via form and design templates. The content (text, images and videos are usually stored in a database) is totally dissociated from the form (template). When an internet user calls up a page, it is produced in that instant by merging content with form.
The big advantage of this concept is the flexibility, scalability and owner friendliness. Lets start with the latter. The owner wants to keep the web page up-to-date, if possible without asking the webmaster to intervene - that costs time and money and is a source of errors. The decoupling of web content from its form allows for the owner to edit the content through a web form sheet without knowing html, php, css and what have you. The update is instantly on-line.
That such a concept is highly scalable seems obvious. Scaleable means that the number of pages, categories, length etc. is automatically taken care of by the CMS. You don't need to worry. You want to add user or client accounts (in general needed for differentiated access management), a comment section, syndication (RSS-feeds for news)? No problem with a CMS, just check the relevant optins in the setup pages.
I also mention flexibility, because Drupal (my favorate CMS) is based on categories. This allows to configure the CMS such that for any given content, the system can produced associated links (same category) in a sidebar for example. The user will navigate in a context-rich and helpfull page that leads him or her to other content of your site.
Typical CMS driven sites are photo galleries and web-shops
Web Shops
Web-shops are just the same an CMS sites, with the addition of a shopping basket, automatically generated emails and invoices, stock management, and a link to a payment system.
Drupal
I have chosen Drupal as a CMS because it is covering the whole palette of features and plug-ins that one can want, because it is secure, and because it is free of charge and Open Source. It is a mature product; IBM recommends it to all their clients, and that speaks for itself.
When we get together to set up a web page based on a CMS the process is quite the same as for home pages. In addition you'll need about half an hour of training in order to edit you content yourself.