Add recommendations for writing headings based on SEO and AI needs

[IngridT1]

Severity

Critical (blocks usage or causes major problems)

Priority

P1 (highest)

Relevant page(s)

No response

Describe the proposed change

Add information to SSG that reflects the JTBD and SEO recommendations (see the section about headings in the Intro to Minimalism class).

Why is this change needed?

JTBD heading recommendations are being written now. We need to get this done. @Preeticp

Additional context

No response

[IngridT1]

From a Google Gemini search:

The optimal heading length for SEO balances clarity, keyword inclusion, and search engine truncation, generally falling between 50-60 characters (or 5-10 words) for H1s and titles, while other headings (H2s, H3s) can be longer but should stay concise to avoid clutter and maintain readability, focusing on descriptive, scannable text rather than hitting a strict number.

In terms of pixels, the limit is 600 pixels.