Explain it to me like I'm new
Row Level Security is a database rule that decides, row by row, who is allowed to see or change data — enforced by the database itself.
Think of it like
A filing cabinet where each folder checks your badge before it opens, no matter who asks.
What actually happens
Every query is rewritten by the database to include your policy conditions, so the browser cannot request rows it is not allowed to have.
query → database → policy check per row → allowed rows only
Where I encountered it
While learning why "hide the button" is not security.
Next words to meet
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