A good header needs to put attention on the title and then lead the reader to the description, which must be readable.
A few quick hacks to achieve this hierarchy include:
1. Stronger font-weight for the title
2. A consistent type scale system. The most common is x1.25, which means that if the title is 40px, the subtitle must be 40/1.25 = 32px.
3. Lower contrast for the subtitle
4. Proper line-height for the description text.
5. Left alignment, since it boosts readability