Most every potato chip you can buy in a plastic package in this country is Halal, and check the Circled P ~ that means Pareve ~ a word derived from Hebrew. That means the product (in this case potato chips) contains no animal meat or milk! That doesn't mean its Kosher, but for people who keep Kosher it's important.
We have other signs now ~ a big G says the product is gluten free. Many products are marked to indicate that nuts may be present.