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.
A meta description tag is a snippet of HTML code in a web page header that summarizes the content that is on the web page.The meta description is usually placed after the title tag and before the meta keywords tag.When optimizing a web page for search engines (SEO), it is considered a best practice to use meta description tags.Before Google and other search engines changed how much importance they place on meta description tags, the keywords in a meta description could influence ranking on a search engine results page (SERP).hen optimizing a web page for search engines (SEO), it is considered a best practice to use meta description tags. Before Google and other search engines changed how much importance they place on meta description tags, the keywords in a meta description could influence ranking on a search engine results page (SERP).