Watch this video first:
Each social media platform has a different purpose and a different way of connecting with people. While nearly everyone has a Facebook page, when it comes to other accounts, they can get very "Team Insta" or "Team Snap." This is not a bad thing but it will affect the way that you participate in these channels.
When identifying which platforms you should be participating in, it is important to not that you cannot do more than 1-2 well while your learning how to run them effectively and grow your niche audience.
Let's avoid burnout and say, NO, to many irons in the fire. You can be successful just using 1-2 platforms.
This info-graphic below via Sprout Social, is a great tool in analyzing the audiences that hang out in some of the major platforms.