Now I found out what is the importance of the tags like <strong></strong>, < em></em>, <abbr></abbr>, and <blockquote></blockquote>.
STRONG
· The HTML
strong
tag is used for indicating stronger emphasis than the em
tag. The strong tag surrounds the emphasized word/phrase.· This element brackets text which should be strongly emphasized. Stronger than the EM element.
· The strong tag is another phrase element. It makes text bold in most browsers.
· You may wonder why there is a <b> (bold) tag and also a <strong> tag since both are displayed in bold type.
· Technically, the strong tag was meant to provide emphasis aurally for people surfing the web using screen readers, while the bold tag was meant to provide emphasis visually.
· A word stressed with the strong tag should be stressed aloud by the screen reader software, but a word stressed with the bold tag won't necessarily be stressed by screen readers.
EM
· Renders as emphasized text
· EM is used to indicate emphasized text. While it is often rendered identical to I, italics, using EM rather than I is preferred. It allows the browser to distinguish between emphasized text and other text which can be drawn in italics.
ABBR
· The <abbr> tag describes an abbreviated phrase.
· By marking up abbreviations you can give useful information to browsers, spellcheckers, screen readers, translation systems and search-engines.
· The abbreviation tag allows you to pass on useful information about an abbreviation without spelling it out on the page.
· The appearance of the abbreviation can depend on the browser being used, but all major browsers support the abbreviation tag.
· You have to add a title attribute to the abbreviation tag in order for the tool tip explaining what the abbreviation means to show up.
BBLOCKQUOTE
· The <blockquote> tag defines a long quotation.
· A browser inserts white space before and after a blockquote element. It also inserts margins for the blockquote element.
· Use the q element to mark up short quotations!
· The BLOCKQUOTE element allows text quoted from another source to be rendered specially.
· The HTML blockquote is perfect for making a passage of text stand out from the normal body of text.
· It has to be used with some caution though, as it can overlap CSS positioned content due to incorrect browser rendering. For example, the icon box showing which browsers support the blockquote tag is a division floated to the right side. Before adding this extra paragraph to move the blockquote down the page, the following blockquote overlapped the icon box.
The <em>, <strong>, <dfn>, <code>, <samp>, <kbd>, <var>, and <cite> tags are all phrase tags. They are not deprecated, but it is possible to achieve richer effect with CSS.