When people ask about the Rapture, there is a lot of fear and nervousness about it. Seriously, if you look at the popular ideas about the Rapture, there's fires and earthquakes and what if the pilot is raptured out of the plane and what if we are left behind...
These are all off base. If you want to get what the "Rapture" is - it's simple. Look at 1 Thessalonians 4:13-18. The rapture is simple. When Christ returns, it's going to be big and obvious, and all the faithful from all times and places will be gathered around Christ. Anyone who is alive when Christ returns will be "raptured". It's a good thing.
But I'd recommend paying attention to how people talk about the "Rapture" and the End Times. Do they speak of it as a good thing? They ought, for Paul teaches us this so that we might not be concerned about those who have fallen asleep and that we might comfort one another.
Here is the simple way to know if someone is off base when talking about the Rapture. As St. Paul says, "Encourage one another with these words" when someone uses them to try to scare and terrify you, it's not being used rightly.