Add descriptive alt text to every image. It is essential for accessibility, helps Google understand your images, and enables image search traffic.
Add explicit width and height attributes to images. This prevents Cumulative Layout Shift (CLS) which is a Core Web Vitals metric.
Linking to authoritative external sources can boost your credibility with search engines.
Below average. Aim for 25%+ text-to-HTML ratio. Reduce unnecessary markup, inline styles, and scripts.

Add an og:image (1200x630px recommended). Shared links without an image get dramatically less engagement on every social platform.
Add an og:url to specify the canonical social URL. This prevents share counts from splitting across URL variations.
Add og:site_name to show your brand name alongside shared links.
Add a twitter:title. Without it X/Twitter falls back to og:title, which may not be optimised for the platform.
Add a twitter:image. X/Twitter may not always use your og:image as fallback.