How to edit a website depends on the application/software you have used for the website's creation.
Not so long ago one of the most widely used applications for quickly and easily building a website was FrontPage. With it you could create, upload and edit a website without having any HTML knowledge.
However, Microsoft stopped the development of FrontPage and now most web hosting providers don't officially support it.
Fortunately, there are many commercial and open-source products which continue to make the creation of a website a quick and simple task. You don't have to be a programmer to create a beautiful and functional site.
Commercial products such as Dreamweaver offer far greater freedom than Frontpage did and building/editing a website is now easier than ever. Dreamweaver even has an extension through which you can migrate your FrontPage site to Dreamweaver.
Open-source applications such as Joomla don't fall behind. There are numerous free components/modules/themes/plugins which can turn your site from a simple personal page into a real online portal with a blog, forum, gallery, etc.
Let't not forget online sitebuilders. With these tools you can create a website in just a few clicks. You can then easily edit the website and add new features.
Laws Hosting provides the best hosting environment for sites built with Joomla, Dreamweaver, and many other CRM applications