I got a deli chicken salad from Walmart and it says it's good til April. Is that true? How?

I got one of these chicken salads a couple weeks ago at Walmart and forgot about it in my fridge. I went to go throw it away and it's expiration is April 24. How is that possible? I know canned chicken can be preserved but I usually throw refrigerated chicken out after 3-4 days. Can I still eat this, or should I not?

I got one of these chicken salads a couple weeks ago at Walmart and forgot about it in my fridge. I went to go throw it away and it's expiration is April 24. How is that possible? I know canned chicken can be preserved but I usually throw refrigerated chicken out after 3-4 days. Can I still eat this, or should I not?