Schema Markup: The Quick Wins Most Sites Still Miss
Types worth the effort
Organization, Product, Article, FAQPage, BreadcrumbList, LocalBusiness, and SoftwareApplication. That's the shortlist. Everything else is niche.
Validation over volume
One perfectly implemented Product schema beats 14 half-broken ones. Use Google's Rich Results Test and fix warnings — they become errors within a release cycle.
The review trap
AggregateRating schema without genuine reviews is a manual penalty waiting to happen. Don't fake review counts, ever.