The following are five SharePoint latency aspects to be aware of:
1) Latency can affect users' satisfaction in regard to being productive.
2) Knowing the common causes and situations for latency will be beneficial.
3) Tools are available to measure latency.
4) Design changes can make a difference in regard to minimize latency.
5) Knowing how to troubleshoot latency and pinpoint the cause especially in regard to slowness is valuable.
The following are some sites for information on this topic:
Microsoft 365 SharePoint Online Performance Troubleshooter
Performance in the Modern SharePoint experience
https://learn.microsoft.com/en-us/sharepoint/modern-experience-performance
Performance Guidance for SharePoint Online portals
https://learn.microsoft.com/en-us/sharepoint/dev/solution-guidance/portal-performance
