What are the most effective actions that top e$-$commerce brands use to encourage their customer to buy more products$/$services than their original intention?

They use the upsell$/$cross$-$sell techniques, create a quality customer experience, focus on seasonal sales and customer retention

They run lots of sales and promotions to attract lots of new people to the site

They change the look of their online store regularily to keep it a happening place to visit

They spend more money on digital advertising to convince people to purchase more products or services