There many different types of a website, to name a few:

Brochure Style / Informational Site
This is the simplest type of websites where you just post information about your product(s)/service(s) so that your customers can learn more about your business. Also, such websites can generate online leads if SEO is applied.

E-Commerce
It is not just informative website, it can actually collect money from clients who pay for your product(s)/service(s). A shopping cart and a strong admin are usually included in such sites.

Editing Capability / Admin Section
If you want to be able to edit and update your website yourself without the need of using a webmaster, then this would be the perfect solution for you. An Admin web application will be developed for you.

Database Integration
If you already have a website (or not) and wish to integrate a database to collect all contact info submitted by users, for example, then this is what you need to add to your website.

Splash Page - Flash Intro
It is a flash intro to your website. The main purpose of it is to showcase your business and what makes it different than competitors. Others use it as a luxurious entry to their website.

Flash Animation - Flash Design
You can either have a flash banner that is lightly animated to grab users' attention or just have a whole animated, interactive flash website.