You had a company build your creation, great! Does it do everything like you want it to? Some questions you need to ask before your site gets popular. Can my site handle 50000 users at a time? Can a user input a SQL injection and hack your site? Are all the validations on the different forms checking out? Testing engineers try to break your site before customers tell the world. I also find issues with your site before the hackers do. Hire me to tell you about the problems before you start loosing customers.