Gmail is a very powerful service that lets you do more than just sending and receiving emails. It has been around for quite some time now, and has always tried to stay ahead of its competitors by offering more storage and a faster system along with other cool features that help it stay ahead of the game. There are apps that collaborate with Gmail to provide additional, powerful functionality. Now, using such methods, you can schedule your emails, track them, and more. Scheduling emails to be sent later is a particularly useful feature which will help you become organized and efficient, and increase your productivity. You can do this for free using either of the two apps; Boomerang and Right Inbox.
There can be many uses for scheduling emails. Firstly, it looks a lot more professional if all your emails arrive at one time. This makes you reliable and dependable, and your email contacts will learn to wait for your emails at particular times of the day, hence saving them the time spent on anxiously waiting for your emails.
Secondly, it's one the strategies in email marketing. Emails are more effective if sent in accordance with the receivers' time-zone. These days, email is so popular that a lot of people get drowned by excessive emails everyday, and hence have to skim over and delete most. So to make your emails appear somewhere near the top of their inbox, you need to determine what time they log on (such as after 9 A.M. when they arrive at their office), and send your mails accordingly.
Gmail, like other mail services, doesn't give you a scheduling option by default. You need to install a third-party add-on to make scheduling work. Usually, these are browser add-ons (no, they don't require your browser or PC to be open at the time of sending emails). The most popular such tools are Boomerang, and RightInbox. Both have free and paid versions.