Is this firebase rule okay for security?

General
1

rules_version = ‘2’;

service cloud.firestore {
match /databases/{database}/documents {
match /{document=**} {
allow read, write: if true;
}
}
}

I am using this rule in firebase because every time I use rules that is provided by AI, I get insufficient permission. So, I wanted to know if there will be a threat if I use this. If yes, how to resolve this?