Art Business Development and Social Media Relationship - Questions

I'm looking into art business models and have some questions for those of you who are already in the business of making a living with your art.  To answer, please reply to this post.  Comments are moderated, so if you'd like your reply to remain private--please note that.

• What social media methods are you using to share and/or sell your art? 
• Do social media platform algorithms support or hinder your efforts? 
• What are you favorite platforms for art sharing? 
• Do these favorites differ from your favorite apps to keep in touch with family and friends?
• In this day and age of such an array of technology platforms for social media uses, information sharing has become complicated.  It used to be a website or blog.  Now it seems you may need Facebook, LinkedIn, Instagram, Vimeo, and others in addition to a website and blog to work at reaching your art audience.  Is social media important to your art sharing?  If not, how do you share your work?
• On the business side, how does or has social media affected how you conduct selling your work?  
• What are the logistics for selling your art?  For example, do you have a set-up on one site for art sales (e.g. by credit card) and drive interest from your other site(s) to it for sales?     

What other important questions are there to ask and answer as part of developing an art business plan?

If you chime in with a reply, thank you so much for sharing your expertise and experience!