How to add a facebook share button to your web site

site

Steps

Add below codes to your page body.

Button Script

<!-- Load Facebook SDK for JavaScript -->
<div id="fb-root"></div>
<script>(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "https://connect.facebook.net/en_US/sdk.js#xfbml=1&version=v3.0";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>

Facebook Share Button

<!-- Your share button code -->
<div class="fb-share-button"
data-href="you_site_page_url"
data-layout="button_count">
</div>

Reference

Facebook HELP