Which is better holding ground for a conventional anchor?

The holding ground for a conventional anchor is generally considered to be mud or soft clay, as these materials provide greater friction and resistance against the anchor's flukes once they are set. Sand can also be suitable, but it may not hold as securely as mud, especially in shifting conditions. Rocky or hard seabeds are less ideal for conventional anchors, as they can prevent the anchor from properly embedding and securing itself. Ultimately, the best holding ground depends on the specific anchor type and environmental conditions.