Internet marketing involves a lot of online marketing activities. When it comes to social media marketing, you should target the platform that:
1. Your target clients mostly use: For example if your targeting photographers, Instagram will be a good platform to use to market yourself.
2. Most used social media platform: The more the users a platform has the more your audience so you should make more effort on platforms with most users.
These are just but a few of the considerations you must make. [SNIP. Please keep self promotion in your sig]