Day 16

 em> The element gives <em>emphasis to the text contained within it, and the element can be branched <em>(i.e. using more than one element <em>within each other) and each level of branching gives more emphasis to the text.

<i> A representation of a part of a text that must stand out from the rest of the text for some reason, such as technical terms, phrases in a foreign language, or the facial expressions of a character in a play, etc. This element is usually displayed in italics.

<kbd> Represents user input and causes text to be displayed in the default fixed-width font used by the browser.

<mark> The element is used <mark>to highlight a section of text for the purpose of indicating that it is important in a particular context. For example, it can be used to highlight every time a keyword appears in a search term on the results page