It just flags it as urgent in the receiver's inbox, but don't do it unless they get high volume, even then it is annoying and most will just make you wait longer
When the contents of the email are of high priority to the recipient.
The Priority ! - High Priority
In Yahoo Mail, you can send high priority emails by marking them as "High Importance." When composing a new email, click on the three dots in the toolbar at the bottom of the email composition window and select "Set High Importance." This will flag the email as high priority for the recipient. Keep in mind that the recipient's email client settings will determine how prominently the email is displayed as high priority.
Exclamation mark is a high priority email. Down arrow is low priority. Nothing (no sign) is normal priority.
If you go on to your emails and then set the high priority off should do the job
since she is a celebrity her information is considered high priority and it is not known to the public,
Priority in the email indicates the importance of the message. The message can be high, low or with a normal priority. If the message is with a high priority, it is often indicated with a red exclamation mark. That allows the reader notice this message more easily. Of course, the notification depends on the reader's email client. Sometimes the important messages may be displayed in red and messages with low importance may be grayed out. The priority also does not indicate how important the message is to the reader. It only indicates how important the message was to the sender. Reader may find the message unimportant and mark it accordingly.
It means the sender marked the message as "high priority"
The health and wellness of our students is a high priority.
In gmail, you can set up priority inbox, but apart from that, I don't think so.
Depends on what application you use to download, but usually this indicates that if there's a lot to download the objects with a high priority will get a larger share of the available bandwidth, so they will be downloaded faster.
The priority level of the task "keyword" is high.