Open and click-through rates (CTRs): Knowing who are engaged customers (those who open most emails and end up making purchases) versus inactive customers (who haven’t opened any emails in months) can be invaluable. Marketing campaigns announcing a new product should absolutely include those engaged customers, while re-engagement campaigns can be created to try and entice the inactive customers.

When your website users land on a page that solicits their personal information, tradition might tell you to include a pre-checked box that opts the user into an email campaign so they can receive updates and special offers related to your business. Today, having this box pre-checked is in violation of GDPR. So, to comply with GDPR, make sure your European users and customers are given the clear option to opt into your email newsletter themselves -- don't make the decision for them.

It is vital to consider the questions that a customer will be answering - the information they will be seeking – at each stage of their journey because your email campaign should provide the answers. If a customer leaves an item in their online basket and they don't complete the purchase, send a personalised basket abandonment email including that very item:
This is a perfect guide for any beginner to the world of email marketing. It can often be super confusing when you are new to email marketing and you may not be aware of how to go about things. This article is great as it talks about the various factors that can make email marketing campaigns a true success. I agree with every single point that has been mentioned above. I especially agree with personalizing emails as this can totally grab the attention of any reader. Thanks for this post!
Remember, data collection is a two-way street. People won't give you their data for anything. So, think about how you are managing your subscribers' expectations. How clear is it to new recipient what they are going to be receiving from you? Try and get a good a feel for the experience of the person receiving your data collection methods as you can at this point.
_{Keep the subject line and pre-header short: The subject line is crucial. Keep it short so the reader knows exactly what the email topic is about. And the pre-header text (also known as snippet text), don’t let it go to waste by using “To view this email in your browser…”. Instead, summarize the email or include a call to action (i.e., Use “FREESHIP” to get free shipping).}
Customers demonstrate the potential to become more valuable customers. These are profitable when assessed in terms of lifetime value, but the number of product holdings or current value is relatively low compared with the group above. Recommendations about relevant products based on their purchasing and browser behaviour can be an effective approach with this segment.
This article is by far one of the most interesting and fun articles that I have read in a long time. I say fun because the points mentioned here are simple and easy to read. They are not long passages that speak a lot and tends to lose focus. On the contrary the points mentioned here were in short crisp sentences that did not bore me but made my read a pleasurable one. Thanks!