LinkedIn:Linked In is most suited for professional and business networking- right from typical 'white collared' to artistic and expressive professions. Associated Slide-Share allows one to easily showcase work examples.
Twitter:Twitter is best if you are looking to engage your audience in a conversation. Great for sharing information, asking or answering questions or soliciting opinions. It is also very helpful for publicizing links to published content like on your blog or company website.
Instagram in great for brand promotion. A picture paints 1000 words and if you have images that convey your message then Instagram allows you to reach wider audience (currently second only to Facebook) with your photos and videos.
Pin-boards allow you to showcase visually impressive content and plays a crucial role in brand promotion. Particularly effective for content targeting women. Pins need to provide standalone value, so that followers will be willing to re-pin and save.
Facebook is one of the best social media platforms for Businesses to market their products. When it comes to individual professional advancement, it can be quite helpful for media and other creative professionals. Anyone can have a professional page on Facebook to showcase their work and by using unique marketing ideas, one could create a good buzz and obtain widespread exposure.
Similar to Facebook, YouTube is great for creative, media and other professionals to showcase their work and directly reach their target audience. Many video creators indicate that they generate revenue not only from direct sales but also from consulting engagements and other opportunities from extensive exposure.