I once helped a friend prepare a new website for his small business, and we nearly missed a few issues before launch. While discussing a web design and development agency, I realized how important it is to test everything before visitors arrive. Some links led to the wrong pages, the contact form was unreliable, and a few images loaded slowly on mobile. These seemed like small problems, but they could easily frustrate potential customers. A final review can save a lot of trouble later. What do you usually check first when testing a website before launch?