Honestly, the flow charts on https://shopify.dev/tools/app-bridge/authentication sum up the entire concept very well once you understand both the oAuth flow on Shopify with App Bridge, and the underlying principals of how JWTs work.
Honestly, the flow charts on https://shopify.dev/tools/app-bridge/authentication sum up the entire concept very well once you understand both the oAuth flow on Shopify with App Bridge, and the underlying principals of how JWTs work.