Tateru Nino writes: "One of the most misunderstood concepts in any online medium is lag. Lag essentially refers to a delay. Most commonly we're referring to the delay between when you expect something to happen and when it actually does happen.
What makes lag difficult to understand is that it is a syndrome. There are multiple possible causes for lag, some under your control, and some not -- all of which contribute to that molasses-like feeling, and occasionally crashes or disconnections.
To help you make the most of your Second Life experience, we'll look over how to easily and simply identify what kind of lag you're getting, and what (if anything) you can do to reduce it."