Gmail

Google offers a free email service that users may access via their Gmail accounts. As of the year 2019, it has 1.5 billion active users all around the globe. Gmail is normally accessed by users using either a web browser or the official mobile app. The POP and IMAP email protocols are both supported for usage with Google's email client software.

Gmail's storage capacity of one gigabyte per user at the time of its introduction in 2004 was substantially larger than what its rivals were offering at the time in this regard. As of right now, the service comes included with 15 gigabytes of storage space. The maximum size of an email that a user may send is 25 megabytes, while the maximum size of an email that they can receive is 50 megabytes, including any attachments. Users have the ability to include files from Google Drive into their messages in order to transmit bigger files. Gmail's user interface is focused on searching, and it has a "conversation view" that is similar to the way an online forum looks. Because of its early use of Ajax, the service is well-known among those who work on the development of websites.

Emails are automatically scanned by Google's mail servers for a variety of reasons, including the filtering out of spam and viruses and the addition of adverts that are relevant to the context of the email. Privacy advocates have levelled significant criticism against this advertising practise due to their concerns regarding the unlimited retention of data, the ease of monitoring by third parties, users of other email providers not having agreed to the policy upon sending emails to Gmail addresses, and the potential for Google to change its policies in a way that further compromises users' privacy by combining information with other Google data usage. Concerning the difficulties, the corporation has been named as a defendant in a number of cases. The company also claims that the service does not display advertisements next to potentially sensitive messages, such as those that mention race, religion, sexual orientation, health, or financial statements. Google made the announcement in June 2017 that it would no longer utilise contextual Gmail content for advertising purposes and would instead depend on data collected from users' usage of the company's other services.