How do I know my plant is a strawberry plant?
Strawberry plants will normally grow in a 3-leaf pattern. While it is too late now, they produce small white flowers in early spring followed by the red berries, though there are some that bear fruit in summer too. This picture may also help: http://strawberryplants.org/wp-content/uploads/2010/04/strawberry-plant-anatomy.jpg
For more information on growing strawberries, this article will help: https://www.gardeningknowhow.com/edible/fruits/strawberry/growing-strawberry-plants.htm