Wipe, in a computing context, means  to render all data on a hard drive unreadable. The term is often used in reference to making data stored on a computer, smartphone or tablet inaccessible before disposing of the device.
A semantic HTML tag is one that defines a meaning to the enclosed content that a computer can be programmed to understand. In most cases, browsers create some visual difference to content in semantic tags, for example, content in the CODE element is usually displayed in a monospaced font. But this is not a requirement. Many people feel that semantic HTML elements are a waste of bandwidth.
The element is the collection of both the starting tag and the ending tag. In other words, the element is the entire HTML block that creates a paragraph. And the tags are the two pieces of the elementâthe opening piece and the closing piece. Most HTML elements have an opening tag and a closing tag. These tags surround the text that will display on the web page. For example, the paragraph tag has an opening tag: and a closing tag: .