Are people not engaging with your posts? Does everybody else seem to have better social media shots than you? Getting great shots for milestone social events like big birthdays (21st, 30th, 40th etc.) and engagements is a bit of an art, but it's within reach of just about everyone with a smartphone or DSLR.
Photography for social media is a little more relaxed than those used for corporate brochures and websites. They need the professionalism of a commercial shot, but the relaxed location and style of a casual shot. Each shot needs to tell a story, and will still involve a shoot plan - albeit a more flexible