One customer asked if she needs a website for her nail salon since she already has facebook page and instagram, customers finds her on Yelp.
The short answer is YES.
Remember all the profiles and pages on social medias are properties of the social network companies. The time, money and efforts you spend to build up a profile and followers on those networks ends up building up assets for them rather than your own. Creating a website and using social mediass to drive traffic to your website, is the simplest way to build your markting assets.
If you don't know how to create a website, save youself from headaches, hire an expert.