You can deploy a React blog on Netlify that fetches content from a Strapi instance, which is deployed on Heroku, a cloud platform where you can host a Strapi server for free. To do this, you'll need to create a new Strapi instance on Heroku and copy its URL, then deploy your React blog frontend on Netlify by cloning the starter repository and connecting it to your Github account. You can then create new articles in Strapi and see them live on the deployed site, with options for automatically redeploying to Netlify when content is changed in Strapi. Additionally, you can edit your Strapi collection types locally and deploy changes to Heroku. The tutorial also covers various options for Strapi blog starters and provides more information about Strapi.