Smileys, also known as “emoticons,” are glyphs used to convey facial emotions in your text. WordPress provides you option to create smilies inside your text content.
You can easily enable smilies option by visiting your admin area dashboard Settings -> Writing screen and ticking ‘Convert emoticons like :-) and :-P to graphics on display’ under formatting section. When this option is enabled, you may start creating smilies with traditional way of typing two or more punctuation marks.
Some examples are: ;-) is equivalent to 
:-) is equivalent to 
:( is equivalent to 
:-? is equivalent to 
But not everyone knows all emoticons & smilies, it is hard to remember smilies like ragg, roll, oops, evil etc. Hence, by adding a smiley inserter TinyMCE button, you will sure be making things easy for yourself and for other users on your website.
Here comes the use of TinyMCE Smiley Button, a WordPress plugin that activates a smiley inserter button on WordPress visual editor.
Start by installing ‘TinyMCE Smiley Button’ plugin in WordPress
Upon activation the plugin adds a TinyMCE smiley insert button in visual editor present on ADD NEW/EDIT content screens of posts, pages and other custom post types.
All you got to do is click that button, mouse over to the smiley you want to insert and click it. That’s it, the smiley will be inserted inside your content, wherever your cursor is placed.