Answer:

Advantages:

     Knowing these precautions will keep you safe when you're fixing electricity issues, and will help you spend less on hospital fees by helping you prevent getting shocked by electricity

Disadvantages:

     The disadvantage of knowing these safety precautions is that not many people actually need them when having electrical problems because they can just reduce the risk of getting injured by calling an expert technician to fix it for them.(my opinion)

Explanation:

Sorry if this is wrong and hope it helps :)