Computer simulations show that moons can form within disks of dust and gas produced during the final stages of a large planet's growth. These disks could form a string of roughly equal-sized moons like the four Galilean satellites around Jupiter, or one giant world like Titan, which retains a dense atmosphere.
The consequences for such a moon orbiting 55 Cancri f would be short sweltering summers and longer winters; average surface temperatures would rise to 302 Kelvin (29C/84F) during the summer, and plummet to 221 Kelvin (-52C/-62F) during the winter.
These temperatures are based on simple modeling and ignore the fact the moon might have a thick atmosphere containing the greenhouse gas carbon dioxide that would moderate temperatures.
Assuming the adaptability of life on Earth is the norm for biological evolution, then it's not hard to imagine life evolving on a world where extreme seasons are driven by orbital extremes.
Anybody living on the moon would note three brilliant morning or evening stars that are in very close proximity to 55 Cancri's golden yellow disk. These planets orbit far inside 55 Cancri f's orbit. The closest, having the mass of Uranus, completes an orbit in just 3 days. The second, the size of Jupiter, orbits in about 15 days. The third, a Saturn-mass world, orbits just every 44 days. For some of the year the night sky would be dominated by the glow of a companion red dwarf star nearly 100 billion miles farther out.
55 Cancri is such a fascinating system I have no doubt it will be scrutinized with ever-larger space telescopes of the future, and the eventual target for an interstellar probe. The system is older that the sun, and so there would be time for life to evolve to an advanced stage.