Hi, I am bit confused on the proper way to use <section> tags
in the HTML, even after reading about them. Should they be used
inside a <div> tag? replace the <div> tag? or what is a good practice
to use them?
There is no need to put them in a div.
They can replace a div, but only when it is semantically correct. They are not an all-purpose generic container like div, they have a specific meaning. http://www.w3.org/TR/html5/sections.html#the-section-element