Once you get to the full webiste a cookie will be set in your computer this cookie is used to pay Amazon Assistant if you purchase something in the following 24 hours. This program uses both Amazon’s search engines and APIs to allow you to search through the website.
Even though this program looks official, we must remember that it was not developed by Amazon but by some other company. Probably the install process for the downloaded program was modified to include unwanted programs such as Amazon Assistant. Amazon Assistant is an adware that is usually installed along with a program found on-line.