It's not as simple as just posting on social media to guarantee orders. Based on my experience with Pinterest and Quora, consistent daily posting has helped increase impressions on my gig. Initially, my gig was on the 17th or 14th page, but now it's on the 6th page. I achieve this by regularly sharing my gig on these platforms, as well as on Flickr. Occasionally, I also share stories on my Instagram and Facebook linked with my gig. This is my personal experience and assessment. If there are better approaches, I'm open to improving mine.