Customers judge a company by how its website looks. The situation is the same when you meet somebody for the first time – you look at their appearance, clothes, and accessories. When people come to your website for the first time, they look at the design, pictures, and animation. That’s why you can’t leave the default theme after installing WordPress. There are billions of websites on the internet, and at least a hundred of them offer the same or similar products and services that your website does – you can’t afford to make a wrong first impression.