Why do we love to use Drop Menu to display our navigation? Because, it saves space for our website. If you’re building a website with many categories, you need to use drop down menu technique for sure. We can find over internet a lot of tutorials show us how to build a Navigation with drop effect by using Javascript. Today, with this tutorial, you will see a simplest way to build a same effect by using CSS only. With some CSS make-up, your menu will be elegant. Not sure which one is easiest, but for sure it’s the simplest menu comes with drop effect: horizontal and vertical navigation.