Having your own.
WHAT A DEDICATED ADDRESS IS
A public address used only by your account.
WHEN IT WAS ONCE NECESSARY
For certificates, historically.
Modern certificate issuance does not require it.
WHEN IT IS STILL USEFUL
Sending substantial mail volume, where you want independent reputation Services requiring a fixed address Applications that cannot share
WHAT IT DOES NOT DO
Make your site faster Improve search visibility Protect you from server-level problems
THOSE ARE COMMON MISCONCEPTIONS
WHAT IT COSTS
An additional charge, and the responsibility for its reputation.
THE REPUTATION POINT
Your own address means your own sending reputation, good or bad.
That is an advantage only if your sending practices are sound.
WHAT TO ESTABLISH BEFORE REQUESTING ONE
What problem you expect it to solve.
If you cannot state one, you probably do not need it.
WHERE TO ASK
Open a ticket describing what you are trying to achieve.