What debt to equity is measuring
Debt-to-equity compares borrowed capital with the equity base supporting it. A ratio of 1.0x means debt and equity are equal. Ratios above that level mean debt exceeds equity, while ratios below that level mean the equity base is larger than the debt base.
That makes the ratio a quick way to gauge leverage intensity, but it does not say whether the structure is good or bad on its own. The same ratio can mean very different things in a stable utility, a cyclical manufacturer, a bank, or an asset-light software business.