Alexa's Products and Services
Alexa offers a listing of the web's top sites for free. This is valuable information, because it allows web developers to know who the popular websites are. Knowing this they can research these companies and learn about their products. Discovering important websites can then indirectly help you to improve upon your own. Then there is also the option to advertise with these proven high traffic sites.
Alexa also has a toolbar you can install. Installing the Alexa Toolbar gives you more information about the websites you are visiting. Also by installing the Alexa Toolbar, you are contributing to Alexa's database of information. This Alexa Toolbar community helps us to better understand the internet and how we interact with it.
As another product, Alexa offers site audits which help you improve upon your website for better seo (search engine optimization). This is very valuable especially if your new to web developing.
You can also purchase an Alexa Premium Listing. There is two types of listings they offer, a basic and an advanced. Both allow you to custom your site listing so that it includes your company logo, two links, and a custom description. They both also certify that the traffic is accurate. The Advanced listing will include Bi-weekly Alexa Site Audits. The basic subscription is $9.99/month and the advanced subscription is $149/month. Both plans can be canceled at any time.