Grip strength is one of the most daily applicable forms of strength yet many choose to not train it in any form of isolation. Grip strength is going to help you process that animal you just hunted, run that machine gun up to your support by fire, and most importantly help your mom carry in the groceries. Additionally, grip strength is often correlated with being a marker for overall health in several studies (granted this is usually due to individuals with higher grip strength being overall more fit both aerobically and anaerobically). So here are some practical exercises to throw in to build that grip.
Plate Holds - Simply holding a plate for a set amount of time and repeating for sets is a fantastic way to scale grip training as you can work from 5 pounds all the way up to the largest plate your gym has.
Farmers Carry - One of the most utilitarian exercises walking carrying dumbbells, kettlebells, or plates will blast those forearms.
Wrist Curls - After doing those bicep curls go ahead and knock out some wrist curls with the same dumbbell in your hand; save time and build those forearms.
Just Start Grabbing Weights - When you're doing any strength training, ditch the straps for a. few weeks, and don't be doing mixed grip deadlifts, just double overhand that thing. Keep it simple and use that grip!
Lastly, I will say resources like "Grip Genie" can have some great fun accessories to add in such as different grippers, weight attachments, and body weight grip training attachments. Don't neglect the grip, add it in 2-3 times a week and carry all those groceries in one trip.