Question about ZEND Optimizer

Your phpBB Version: 2.0.
phpBB Type: Standard phpBB
MODs: No
Your knowledge: Beginner
Board URL: [url]http://[/url]
PHP Version:
MySQL Version:
What was done before the problem appeared?
What was done to try to solve the problem?
De.scription and Message
I tried to go on a site that is being moved and mentioned needing ZEND Optimizer.
I would assume this would be installed on the server end.
Is this any good?
phpBB Type: Standard phpBB
MODs: No
Your knowledge: Beginner
Board URL: [url]http://[/url]
PHP Version:
MySQL Version:
What was done before the problem appeared?
What was done to try to solve the problem?
De.scription and Message
I tried to go on a site that is being moved and mentioned needing ZEND Optimizer.
I would assume this would be installed on the server end.
Is this any good?