E*TRADE is best known for its Power E*TRADE platform for options trading, alongside its two mobile apps. The Power E*TRADE platform was rated the #1 platform for Options Trading. E*TRADE was also ranked #1 for Mobile Trading in the StockBrokers.com 2020 Review*. Like its closest competitors, E*TRADE now charges $0 per trade thanks to a broker pricing war that took place in October 2019. Full review.
For online platforms, websites give the user options and availability of the stock he wishes for, across all the platforms available. If he places an order, it gets stored in a database. After the confirmation of the trading account and payments, the order gets forwarded and the user gets his stock, in the form of money, transferred to his trading account.