Let's take a look at trading on Coinbase, since they are the largest US exchange for buying and trading with USD. While they offer two separate products, Coinbase and Coinbase Pro (formerly GDAX), people often refer to them both as simply "Coinbase", which can cause some confusion for potential users. So let's take a quick look at the platforms:Basic Overview
Below are the homepages for each platform. The main difference is that Coinbase appears to be very simple, while Coinbase Pro can appear fairly intimidating. But all trades take place on the Coinbase Pro engine, with Coinbase offering significantly higher fees for that simplistic interface.