In HTML5, Blockquote tag has been introduced for the long quotations, that span across multiple lines. If the quotation is short, its advised to use "q" tag. This helps in screen readers to semantically analyze the document and used to find out the quotations across document.
Example:
<blockquote > PLSQL Challenges aimes to help people test and enhance their ORACLE/PLSQL Query writing skills. The most beneficial part of these challenges is that, through these challenges, one gets the opportunity to see better solutions to solve a given problem, from other ORACLE/PLSQL experts. </blockquote>