There are many options when you’d like to have social media buttons at the bottom (and/or top) of each post and page in WordPress. One of the easiest plugins to use is Jetpack’s Sharing feature. It comes with Jetpack so if you already have that installed (which I recommend if only for the stats) then you’re just about ready to go. You’ll need to connect your site to wordpress.com (it will alert you that you need to do so) and drag and drop the buttons you’d like and you’re ready to go. More detail in the video.