That depends on what your meal plan is, do you'd have one? Is there a specific daily macro you are trying to hit?
During the summer, I spend most of my days walking around a construction job site and drink a protein shake with things I add like coconut oil, PB, and cocoa powder. I used to use mass gainers as a meal replacement when I couldn't get away, but I like the shake I make more. Just make sure you get veggies and fiber in your other meals.