Basically social sharing can be by sharing a content or joining/following a social media profile or interest group. Buttons are same but acts different.
Types of social media buttons differs in their label but their function is pretty same. If site has implemented some form of social sharing, You click on the button for the preffered social site, a new window appears asking to log in, content is already there whatever its a plain text or image/video, just click confirm/post/like button and it is published on your social media profile, facebook group, page, pin board, rss feed etc.
Social media buttons can be separate buttons for each social site or in a form of toolbars too. In both cases they do the same thing sharing your content and presence.
Most sites have social sharing buttons implemented in their design. But it can be very easily done if not implemented yet by simply copying a few lines of code.
There are many services that offer social sharing buttons and toolbars came in different sizes and appearances. Installation and use is usually free. Exception is if you want to use some different visual style or show many other social networks beside the most used:
Or follow your profile on Twitter (becoming your follower). More followers = more chances your shared content to be viewed by your followers and if like it to be retweeted (shared to their own followers)
You might also like to add some more:
or mail to your emailOr if this is not enough might consider installing a browser addon for sharing on hundreds of others social sharing and bookmarking sites. I'm using addthis on my browser.
On this site I'm using addthis buttons at the end of every post and a floating toolbar on the left by Sumome which is great offering some other functionalites.
There are many other services besides those two.
No matter which one you choose, must use social sharing buttons to increase your presence and visibility on social media.
These are the methods in practice for Social Media Marketing (SMM), and Social Media Management (SMM). Same acronym !?