The <address> tag defines the contact information for the author/owner of a document or an article.
The contact information can be an email address, URL, physical address, phone number, social media handle, etc.
The text in the <address> element usually renders in italic, and browsers will always add a line break before and after the <address> element.
HTML < abbr > Tag
<abbr> tag defines an abbreviation or an acronym, like "HTML", "CSS", "Mr.", "Dr.", "ASAP", "ATM".Definition and Usage
The <a> the tag defines a hyperlink, which is used to link from one page to another.
The most important attribute of the <a> element is the href attribute, which indicates the link's destination.
By default, links will appear as follows in all browsers:
Usage and definition
The <!DOCTYPE> declaration must start all HTML documents.
The statement is not an HTML tag. It's "information" about what sort of content to expect from the browser.
The statement is straightforward in HTML 5:
