What are records — semantically, not just syntactically? When would you not use one?

public record Money(BigDecimal amount, Currency currency) {
    public Money {                                    // compact constructor
        Objects.requireNonNull(currency);
        if (amount.scale() > currency.getDefaultFractionDigits())
            throw new IllegalArgumentException("scale");
        amount = amount.setScale(currency.getDefaultFractionDigits()); // normalize
    }
    public Money add(Money other) {                   // behavior is welcome
        if (!currency.equals(other.currency)) throw new IllegalArgumentException();
        return new Money(amount.add(other.amount), currency);
    }
}
// Shallow immutability trap:
record Batch(List<Item> items) {
    Batch { items = List.copyOf(items); }             // copy or stay mutable!
}