premium.wpmudev.org/blog/google-tag-manager/
—background on Google Tag Manager.
support.google.com/tagmanager/topic/7679108
—list of triggers that can be tracked in Google Tag Manager.
www.newfoundmarketing.ca/track-youtube-views-with-google-tag-manager/
—instructions for tracking video plays in Google Tag Manager.
unbounce.com/landing-page-articles/what-is-a-landing-page/
—landing page definition and tips.
www.smartinsights.com/ecommerce/ecommerce-analytics/ecommerce-conversion-rates/
—data on typical conversion rates for Ecommerce sites.
optinmonster.com/reasons-your-ecommerce-site-has-a-low-conversion-rate/
—more discussion of how to improve conversion rates.