This document discusses how a JavaScript data layer can help with SEO by providing structured data to search engines. It covers:
1. Using HTML, microdata, and a JavaScript data layer to provide different types of structured data. A JavaScript data layer allows providing data not accessible to robots through HTML alone.
2. Benefits of a data layer for SEO include increased organic click-through rate, better SEO analysis, and enabling dynamic remarketing in AdWords.
3. Examples of setting up a data layer using Google Tag Manager, JSON-LD syntax, and pinging Googlebot to re-crawl pages to index the new structured data.