Text1 wil give some descriptive text to your spoiler. Text2 is the sensitive information. An example follows:
Spoiler:This is how to use the spoiler bbcode
Using this bbcode, you can conceal information that readers will need to click to see. It can be helpful for Student Backstories, roleplay discussion, whatever you like! Just remember, the choice to see this information is in the hands of each user, so don't use this bbcode to record information you actually want to keep secret!
Thanks to Misericorde and Lagomorph for helping me find and install this bbcode!