Amazon will track and record your searches and what you are interested in, and if you are logged in to your Amazon account, this info is SAVED into your account, and if you are NOT logged in to Amazon, they still track and record your habits, with a combination of browser cookies, HTML Canvas fingerprinting, and/or 'hidden' 1-pixel images, just like 99% of the internet nowadays, of which the most penetrating offenders are also Google, Yahoo, Facebook...
If you wish to avoid being tracked, there are standard countermeasures you can take by installing 3-4 different add-ons into your web browser, but most people do not realize just how all of this works, and thus they are tracked, profiled and their habits are for sale to advertising networks, and other 3rd-parties unknown.
These tracking and profiling functions are all documented either in the 'Terms Of Service' and 'Privacy Policy' documents that are presented when you create an account, but NOBODY ever reads them and just ticks the box 'I Agree' because they just dont know any better...
Welcome to INTERNET 2017, where INTERNET watches you!
"If the service is FREE, then YOU are the product being sold!" - which applies to all Google services, YouTube, Facebook, Twitter, LinkedIn, etc...