The EU and trade: Why does it matter?
This Thursday, adults will decide if the UK should stay in or leave a club of countries called the European Union, or EU.
One of the biggest talking points is trade - that's when a country buys and sells things with other countries.
The 28 EU nations are part of an agreement called the single market.
There's a big debate over what the EU vote could mean for the UK when it comes to trade.
Watch Hayley's guide to the EU and trade, and the arguments from both sides.