This is the step in which the website is actually created. The web designer divides the agreed design into components and the web developers implement the visuals into the final product. The coagulation of the artistic talent of the web designer and of the technical skills of the web developer engenders the website.
Technically, many various technologies contribute to the birth of the website in this stage and it implies a deep understanding of the functioning of a web application and internet. It mixes simple concepts such as HTML and CSS with more complex processes, like cloud communication, web services integration or Single Sign On.
Communication with the client is important throughout. I like to keep the client regularly informed and, if possible, to show him how the website is coming about.
Once this step is done, we can all relax a bit... The worst is behind us.