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first class of css this includes how to  add css andn various selectors in  css there are many selectors used in css such as :- 1> Id selectors which is used to select an identity and style them 2> Class selectors which is used to select a class and syle it . 3>element selector its used tos elect an elelement baswd off tag name. for ex: id --      #first {                  color :red; } ]class--   .bgred{      color :red; } we can use various element selectors selectors in one bracket  h1,h2,h3,div { color:red; < html   lang = "en" > < head >      < meta   charset = "UTF-8" >      < meta   http-equiv = "X-UA-Compatible"   content = "IE=edge" >      < meta   name = "viewport"   content = "width= < device-width>, initial-scale=1.0" >      < title > css selctors </ title >      < style >          body {              background-color :  palegoldenrod ;         }       
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 layout of a seo friendly web site by harsh mishra  Semantic  HTML or  semantic markup  is HTML that introduces meaning to the web page rather than just presentation. For example, a <p>  tag  indicates that the enclosed text is a paragraph. ... They define only how the text should look (bold or italic), and don't provide any additional meaning to the  markup . The < article >  tag  specifies independent, self-contained content. An  article  should make sense on its own and it should be possible to distribute it independently from the rest of the site. <!-- layout of a seo friendly website --> <! DOCTYPE   html > < html   lang = "en" > < head >      < meta   charset = "UTF-8" >      < meta   http-equiv = "X-UA-Compatible"   content = "IE=edge" >      < meta   name = "viewport"   content = "width=eh, initial-scale=1.0" >      < title > should be seo friendly  </
 html inline and blockline tags  blockline tags woh hote hai jo left right puri jagah le lete hai inline tags woh hote hai jo sirf utni jagah consume kartre hai jitni unki jarurat hoto hai  The  HTML  < section >  tag  is used to define  sections  in a document. When you put your content on a web page, it may contains many chapters, headers, footers, or other  sections  on a web page that is why  HTML  < section >  tag  is used.  HTML  < section > is a new  tag  introduced in HTML5.  < div >: The Content Division  element . The < div >  HTML element  is the generic container for flow content. It has no effect on the content or layout until styled in some way using CSS (e.g. styling is directly applied to it, or some kind of layout model like Flexbox is applied to its parent  element ).  div is  a block line tag  < span > The < span > HTML element is a generic inline container for phrasing content, which does not inherently represent anything. I