Objective sleep quality refers to how difficult it is for a person to fall asleep and remain in a sleeping state, and how many times they wake up during a single night.
A 2017 study published in the journal Anthrozos found that women reported better sleep quality when co-sleeping with dogs compared to human partners. The survey of 962 women showed that dogs were less disruptive to sleep than human partners, while

Good sleep improves your brain performance, mood, and health. Not getting enough quality sleep regularly raises the risk of many diseases and disorders.

And over time, skimping on sleep can mess up more than just your morning mood. Studies show getting quality sleep on a regular basis can help improve all sorts of issues...

Furthermore, visual representations like the one above help us fully grasp the concept of And Sleep Quality.
The Pittsburgh Sleep Quality Index (PSQI) defines sleep quality through subjective and quantitative measures.
They may ask questions about sleep and wake times, work schedules, sleep quality, daytime naps, and feelings of fatigue.
Sleep quality can be measured in terms of the degree of difficulty a person has to fall asleep and to stay asleep, as well as the number of times a person typically wakes up in a single night.