I highly recommend the article Tips to Optimize Post-Purchase Experience for WooCommerce from the Official WooCommerce Blog by Cody Landefeld on March 8, 2018.
I highly recommend the article 10 Ways to Make Your Next WooCommerce Sale by Andrea Zoellner on March 29, 2018.
View my presentation WooCommerce As a Sales Funnel for marketing tips and tricks to optimize your WooCommerce store. These techniques are useful for any site running advertisement or email marketing campaigns into WooCommerce. Its contents are also useful if running your own promotions for first time customers, flash sales, social media, and affiliate marketing.