You must learn about the audiences of each platform and see if they match your target market.
Each social media platform is different, so it's also important to consider which platform would be the best fit for your business.
For example, if you're a B2B company, LinkedIn would be a better platform than Facebook. If you're a restaurant, Instagram and Snapchat would be good platforms to use.
If your target market is millennials, then Snapchat or Instagram would be a better choice than LinkedIn.