Yes, it's generally recommended to cook steak before putting it in a slow cooker.  Searing the steak before slow cooking helps seal in the natural juices and enhances the overall flavor of the meat. Once the steak is pre-cooked, you can then transfer it to the slow cooker along with other ingredients, such as vegetables, seasonings, and sauces, to create a delicious and tender meal. Slow cooking will further tenderize the steak and infuse it with the flavors of the other ingredients for a satisfying and effortless dish.