The importance of a good thumbnail is that it creates a first impression, establishes credibility, and increases the click-through rate.
A catchy thumbnail should have-
1. High-quality images
2. Clear use of text
3. Proper branding
4. Unique and clean
5. It must not be overcrowded with elements
Goals/Requirements:
1. Unique thumbnail aligned with branding
2. Bold use of colors
3. Appropriate captions or text