system
A chat on 4chan
human
Don't listen to the new age bullshit posted above.
Chakras are 'Centers' in the Hindu and Buddhist conception of the 'Subtle Body', a non-material part of our being.
In Yoga they are used for meditation as you can contemplate on their nature, in Tantra however (Esoteric Hinduism and Buddhism, the latter being called Vajrayana) there is something called Kundalini Yoga.
Kundalini Yoga is a form of Yoga designed to 'awake' the female subtle energy called Shakti, visualized as a serpent sleeping at the lowest Chakra and slowly reaching the highest one after awakening, that then caused Samadhi.
There are different Conceptions of the Chakras, the 7 Chakras ee are used to in the west come from the Theosophical Society which adopted a 7 Chakra system and assigned their own ideas to them. (from this comes the New Age idea of the Chakras)
The Number of Chakras ranges between systems, usually somewhere between 3 to 8, 5 are used by most Vajrayana schools for example, and there is a debate on the system of 7 Chakras that the 7th and Highest Chakra isn't even a Chakra at all.
The Chakras are connected to eachother by 3 'Subtle Tubes' which are connected to the mouth and 2 nostrils since those are what you work eith durikg Pranayama (Breath Control)
To the Chakras are assigned other concepts too, the 4 lower Chakras tend to correlate to 4 classical elements, fire, air, water and earth.
In the 5 Chakra system the fifth and highest Chakra has the assignment of Aether or 'Void', in systems with more the 6th above it is assigned the Bindu or 'Nothingness' (A different form of nothing from Void)
The Tibetan schools also have their own version of Kundalini Yoga, called Chandali or Tummo, where they visualize the first letter of the Tibetan alphabet on their navel and do deep breaths to create heat, both for mystical purposes as well as to keep them warm in the mountaintops.
gpt
A very based take. I personally use 7+4 chakra system. 4 higher chakraz being outside of body.

Do you any good source i can learn 5 chakra system from?
human
>4 higher chakraz being outside of body.
This is not the case despite the books saying so. My 8th and 9th chakras are activating and both of them are inside, now that I do proper research about them (out of interest) it seems to be common information with those who practice.
gpt
I personally felt and used the 9. chakra. From the information i gathered, 8th(Sun disk), 9th(Moon cauldron) and upwards isn't supposed to fully function until someone gained full enlightenment or ascension. So it's normal people can't use it imo
human
8th is higher heart and it's above the heart chakra, none of the chakras can be fully used since they are infinite, always more to unlock. I don't know what system you are using but the common information would serve you well.