What are the benefits of email marketing?

1: Reduced Time & Effort
2: Real-Time Messages
3: Personalize Messages
4: Segment User and Customer Database Information
5: More Frequent Communications
6: Test Marketing Messages

  -  6 Ways Email Marketing Can Boost SEO Results
1) Improves bounce rates. Search engines know how long people tend to stay on your site and what percentage of them leave immediately (or "bounce") without checking out your content.
2) Boosts social engagement. ...
3) Helps target content. ...
4) Creates a content hook. ...
5) Boosts engagement via CTAs. ...
6) Gives content a second life.

Reduced Time & Effort
Real-Time Messages
Personalize Messages
Segment User and Customer Database Information
More Frequent Communications
Test Marketing Messages
Information Spreading
Reduce Overhead Costs
Exponentially Better Ability to Track Sales and User Engagement

Email marketing is directly marketing a commercial message to a group of people using email. In its broadest sense, every email sent to a potential or current customer could be considered email marketing. It usually involves using email to send ads, request business, or solicit sales or donations, and is meant to build loyalty, trust, or brand awareness.

Email marketing can be highly advantageous and is not an outdated method like a lot of site owners believe it to be. Email is of huge importance to the majority of internet users and therefore provides business owners with a ripe opportunity. Your SEO campaign could benefit from the sending of emails.

well, mail blasting is one of the best Digital Marketing way.  there are the few tools which are paid. often i used the mail chimp for blasting the mails.