While some plants need lots of sun in order to grow, others can do just fine in very shady areas.
What about tomatoes? Can tomatoes grow in shade?
Yes they can, but just not very well!
Tomatoes are sun-loving plants, and do much better when they have access to full sunlight.
Take this into account when planning your garden, and try to plant your tomatoes in a spot that will give them the most direct sunlight for the longest periods of time each day.