There are several factors to consider to ensure the best user experience, admin412.

Intuit aims for frequently used QuickBooks Online (QBO) pages to load within 10 seconds and monitors its systems to maintain this target.

QBO relies not just on the web but also on your device’s processing power, available memory (RAM), and internet bandwidth. Any weakness in these areas can impact performance. In this case, you can verify that your system meets the minimum system requirements.

Here’s how to ensure smooth performance:

• For optimal performance, use Google Chrome. If already using it, ensure it's updated to the latest version.
• Keep your operating system up to date and confirm it meets the requirements.
• Test your internet speed using a Google Speed Test and review the results to assess your bandwidth and its impact on performance.

I'll include this article for additional reference: Why is my QuickBooks Online slow?

Feel free to reach out with any follow-up questions about improving your QBO performance.