A rigid steel fork doesn't have suspension, but the steel itself naturally flexes to absorb road buzz and small bumps—more so than a rigid carbon fork. This built-in compliance makes long days in the saddle more comfortable without adding the weight and maintenance of a suspension fork.
Steel forks really shine when durability is your top priority. They're virtually indestructible, which is why they're a go-to for bikepacking builds where you're loading up with gear and riding remote routes far from a bike shop. If you crash or hit something hard, steel bends rather than cracks, and it can often be repaired in the field.
The trade-off is weight—steel forks are heavier than carbon. But for riders who value reliability over speed, especially on multi-day adventures with heavy loads, that extra weight buys serious peace of mind. If you're racing or sticking to smoother gravel, carbon or suspension may suit you better.