Moldings

Exterior Moldings (sometimes called "wall bands") are designed to frame and separate sections of a wall. Moldings are most commonly used along the (mandatory) building joint between the first and second floor, or just along a section of wall to fill in otherwise "plain" space. Stucco moldings can additionally be used along the bottom of a wall for a more finished termination, or as pilasters on the corners of walls.
Example:
The wall band running along the bottom of the porch, and continuing horizontally between the first and second floor.