(NerdWallet) - Trader Joe’s is a national chain of grocery stores with a bit of a cult following. There are dozens of social media accounts dedicated to Trader Joe’s shopping hauls and recipes using only items found at the store. Trader Joe’s even has its own podcast.If you’ve never shopped at Trader Joe’s before, it can feel overwhelming. Our guide can help you find the best things to buy at Trader Joe’s and ways to save money.What you should know before shop