Final answer:
The statement is true as a market segment profile describes both the similarities within a market segment and the differences across various market segments.
Step-by-step explanation:
The statement is true. A market segment profile indeed describes the similarities among potential customers within a segment, indicating the common needs, preferences, or other characteristics that define that segment. Additionally, it explains the differences among people across different market segments, helping businesses to tailor their marketing strategies appropriately and target each segment effectively.