Online marketplace AliExpress is celebrating its 15th anniversary with a sale thats running from now until March 26, with huge savings on items across the site. Plus, you can get even more money off by entering specific codes at checkout (details below). So we figured now would be a good time to let you know some info about the site and how it works.If youre not familiar with AliExpress, it started in China in 2010 with the goal of connecting products to an audience beyond the borders of their home country. Its a marketplace where manufacturers and wholesalers can list their products directly, allowing users to buy straight from them without involving a bunch of middlemen. Small- and medium-sized businesses get to expand their reach, while buyers save on costs.The site has grown exponentially during its 15 years of existence, serving people across the world. Here are its five best features:Low PricesThis is likely what youll notice first when you visit AliExpress for the first time. Prices tend to be lower across the board, but on top of that, the home page features a revolving door of specific items that are massively marked down. If you visit the Local Delivery page, you can find even more discounts on products shipped from local warehouses. You can scroll all the deals currently on offer or click on individual categories to filter things.For the current anniversary sale, prices are particularly low. And if you add these discount codes at checkout, you can save even more (only one code is useable per order, and these are only good until March 31):Code: IFP8WNN for $3 off orders of $19+Code: IFPQHLH for $6 off orders of $39+Code: IFP3TXY for $15 off orders of $89+Code: IFP7FJZ for $25 off orders of $159+Code: IFPI3V5 for $40 off orders of $269+Code: IFPD5NS for $50 off orders of $359+Code: IFPPVZR for $70 off orders of $469+Code: IFPRZAZ for $100 off orders of $599+Wide Range of ProductsSpeaking of categories, AliExpress has lots of them, including electronics, fashion, jewelry, home & lifestyle, and lots more. Whatever youre in the market for, chances are pretty good you can find it. Theres listings for everything from ergonomic chairs to gaming consoles to vacuum cleaners. If youre looking for a certain category, you can use the dropdown menu in the top left corner of the home page to see even more options.Quality Protections and Return PolicyOn each product page, you can look in the top right corner to see the name of the seller, where theyre located, and how long theyve been in service. For established sellers, you can also see customer ratings on the sellers communication, shipping speed, and whether the item was as described. As with other online marketplaces, its not possible to guarantee that the item will arrive in working condition or as you expected, so there are protections in place to help with that. If your package was lost, damaged, or took more than 20 days to arrive, you can get a refund. If you suspect an item you received is counterfeit, you can return it for free and get a full refund. If youre not satisfied with your order for another reason, you can send it back within 90 days from when the order was placed or within 15 days from when you received it, depending on where the item was shipped from. And your first return for each order is free.Global ReachWhile AliExpress started in China and predominantly works with Chinese brands, the products featured on it are not exclusively shipped from there. There are listings from all over the world, which is a big reason why its served more than 150 million users in dozens of countries. There are many items shipped from the United States, which are noted with a special icon on search pages and in the shipping info of the product page. Or you can go to the Local Shipping page and see all items that enjoy fast local delivery.Free ShippingBig Save listings also come with free shipping without minimum purchase requirements or location restrictions. Big Save items will be clearly noted with special icons on search pages, a large red bar on the product page, and another icon in the shipping information section. You can also go straight to the Big Save page, where all listed items have free shipping.