In email, PS stands for "postscript," which is used to add extra information at the end of a message that doesnt relate to the main topic. It comes from the Latin word "postscriptum," which means "written after". Although PS is not necessary in electronic communication since you can always edit your email before sending it, it can be beneficial in some situations. Here are some reasons why using a PS can be beneficial:

• Emphasize your point: A PS can be a great tool to emphasize the main point of your email. For example, if youre writing an email to remind your coworker of a deadline they have to stick to, you can add a PS with the date in question to emphasize the importance of the deadline.

• Call to Action: A PS is used in marketing as a strategy to get people to do something. You can include a Call to Action in the PS if you need your reader to do something specific. The Call to Action should already be included in the body of your email, but a PS serves as a reminder.

• Capture readers attention: A PS stands out from the rest of the email, captures the readers attention, and makes them want to read the whole email. This is especially important for companies that send emails to their customers.

Although the use of PS in email is purely stylistic, it is still very much in use today. Periods or no periods, "PS" should always be capitalized.