For a successful launch, it's important for me to understand your goals and objectives, who the site is being built for, what functions it should fulfill. The following things will also be helpful:
[1] Business Description - information about what you do, who your target audience is and what services / products you offer.
[2] References - examples of websites you like. This will help me better understand your visual preferences and expectations for the project.
[3] Materials - logo, corporate identity, texts, photos, etc.
If you don't have any of these, don't worry - I will help you gather the missing information and offer solutions based on your request.