When something is sogginess, it is very wet and not firm.
Sogginess is usually not good because things are not supposed to be very wet and not firm.
Examples:
The sogginess of the ground made it hard to walk.
The sogginess of the cereal made it unappetizing.
I don't like the sogginess of wet socks.
The sogginess of the bread made it hard to eat.
The sogginess of the sponge made it useless.
The sogginess of the paper made it tear easily.