It helps to create a copy of the set of matched elements.
//Please refer following example with normal copy and using .clone()
<div class=”container”>
<div class=”section01″>Data01</div>
<div class=”section02″>Data02</div>
</div>
//Normally it is moved from its old location. So, given the code
$( “.section01” ).appendTo( “.section02” );
<div class=”container”>
<div class=”section02″>
Data02
<div class=”section01″>Data01</div>
</div>
</div>
//To create a copy of the element, you could write the following
$( “.section01” ).clone().appendTo( “.section02” );
<div class=”container”>
<div class=”section01″>Data01</div>
<div class=”section02″>
Data02
<div class=”section01″>Data01</div>
</div>
</div>