Social Media can be defined as communication platform through Internet. Yes, it helps a lot in SEO. Be as transparent as possible, a lot of people avoid interacting with avatars, graphic design, symbols in profile picture. I understand few love their company or idols, but this won't help you attract a lot of people from social media. So, instead of uploading some avatar or symbols or design try to upload your own profile picture or leave it blank. People would love to interact with you if they would find you are adding any value to their life. Be the nicest, most respectful, most ethical person you can be on the net. Never deviate from that, then go out and be helpful, give and you will receive. I'm having fun. I wish the same for everyone.