Hello there, @EL34.

The Condense Data utility helps streamline your company data file. If you are having performance issues, the Condense Data utility should help you improve your QuickBooks performance.

However, before condensing, make sure it's the best option for your company. Condensing cannot be undone at a later point. 

Here are some valid reasons to Condense:

• You have a large data file.
• You are nearing a list limit.
• You have upgraded all your hardware.
• Your accountant and your technical support have discussed other options and are willing to proceed with Condensing.

Please check out this article for your reference to learn more about this process, p: Use the Condense Data utility.

If there's anything else that I can help you with, please let me know in the comment section down below.