If you shop in a chain store, they generally ask for your email and phone number usually in exchange for discounts. Giving them this information opts you into t

If you shop in a chain store, they generally ask for your email and phone number usually in exchange for discounts. Giving them this information opts you into their email and sometimes text spam lists meaning several messages a day, some of which might include relevant information about a sale or discount you're interested in. The end result is that people stop looking at their email because it's mostly marketing spam and they miss genuinely important emails.