Beef jerky is salty because the salt is acting as a preservative, allowing the beef to be shelf-stable. You can reduce sodium some, but should only do so based upon a specific recipe– and know that it may not last as long. Sometimes, adding other seasonings can distract from a salt-forward taste. I’ve also seen some add beef jerky to other mixes, such as trail mix. Of course, it is possible to be overly zealous with salting. I always recommend following a recipe the first time you make jerky to ensure you’re on the right track when it comes to proper seasoning.