Add chicken to the slow cooker. Cover with salsa verde and cook on low for 5 hours.
If you are home, you can open the lid at the 4 hour mark and shred the chicken with 2 forks, if not, no worries, it will still turn out fine!
Use a slotted spoon to remove the chicken from the slow cooker, leaving the liquid behind.
Salt and pepper to taste and serve. The Trader Joe’s salsa is already quite salty, so it doesn’t require additional salt.