Social media today is very visual. This means you will be more effective — reaching more people and making more contacts — if you carefully select and format your photos.
One thing to keep in mind when setting up a profile or page, is the size of the images, not only the cover image but also your profile photo. If you size your photo properly, you will avoid distortion or lack of clarity of your image. See this chart on Pinterest for an infographic of social media sizes, 2015 Social Media Image Sizes Guide.
Secondly, the content of your profile photo is important, especially for business. You want a clear, quality photo without a distracting background. Avoid group shots or your wedding photo. This is a great article — What’s Wrong With Your LinkedIn Photo? — on how to make your Linkedin profile photo suitable. This advice applies to other channels as well.
Generally, graphic and photo content is the most important tactic to optimize you social posts. See this chart from HubSpot. So keep taking and sharing photos!