To quickly add a Table of Contents to all your blog posts at once, install the Jump Links app: https://apps.shopify.com/tocThis is the only Shopify Approved App, which means it is trustworthy and compliant. No sketchy code from random websites or res...

You must be referencing the app Jump Links the only Table of Contents App available in the Shopify App store  We built the app due to frustration as well. We wanted a Table of Contents on our blog and there was literally no way to get it on our blog...