google maps has gone paid

https://developers.google.com/maps/documentation/geocoding/get-api-key

structured data

https://yoast.com/structured-data-schema-ultimate-guide/#structured-data-amp

https://developers.google.com/custom-search/docs/structured_data

https://wpsemplugins.com/downloads/wordpress-schema-plugin/

wordpress hosting

https://wpengine.com/platform/

meta tags analyzer

https://www.seocentro.com/tools/search-engines/metatag-analyzer.html

AMP validation

https://search.google.com/test/amp

make your web site faster

https://gtmetrix.com/

seeing meta tags via web site

https://www.heymeta.com/