I want to do Ecommerce marketing for my Ecommerce Website, Can Anyone suggest the Best Plugin for sending emails? and What are the steps to use same?
You should go with using the https://apps.shopify.com/klaviyo-email-marketing for sending emails. Here is the Guide to Integrating with Shopify: https://help.klaviyo.com/hc/en-us/articles/115005080407-Integrate-with-Shopify.
Binal Savani | iDentixweb
I have personally used Mailchip for sending marketing emails and I'm very happy with it. You'll find in-detail guides on how to set it up and start using their interface.
And if you are looking beyond email marketing, check out some ideas on how to promote your online store from here.
Best of luck!