If you've ever done any Web page design or programming, you're undoubtedly familiar with the structure of a link in HTML. In technical terms, an HTML link uses the anchor element (whose starting and ending tags are <a> and </a>), and one of its main attributes, href, which has a URL as its value. Text or images placed inside the beginning and ending <a> tags make a link that, when clicked, goes to the URL in the href attribute, like this:

<a href="">Click Here</a>

So clicking a link is one form of user interaction enabling you to communicate with the server. But it's pretty limited, because all you can do is make a request for the page that's already supplied by the site designer. For example, if I click a link to the About page, the only reason it goes to the right page is because the site designer has already hard-coded the link with the URL for that page.

Media Settings

Most people leave their media settings at the default settings, but you may find that you want your image categories – thumbnail, medium, large – to be different than the default settings.

Additionally you can tell WordPress where to store your media files when you upload them. By default they will upload to the wp-content/uploads folder.