Runes are a celtic fortune telling tool. Tunes are like I ching, you have some little stones in the first case and coins for the secoand one and the goal is to trow them in order to obtain and to do an interpretation of them.
Each rune have is own symbol engraved on. It is easy to learn, easy to use, not always easy for complex questions (except for those who relly knows runes).
If you want to learn clairvoyance, be your own psychic reader, runes are a good tool for you.
Celtic clairvoyance is also very interesting for those who wants to know more about celtic mythology.
You can ask runes everyday (but be careful, clairvoyance will not live your life for you), that is on of the positive point of runes, you can answer your questions quickly.
Clairvoyance is a way to see you future, a way to see your present but it is not the only way to live your life. So you can ask runes or other clairvoyance tool but you also have to think by yourself, psychic reading can help you thinking but it doesn't think for you.
It is very important to understand that, clairvoayne is a tool, it is not the only tool, you have to manage your life by yourself, no let psychic reading or reader do it for you.
Runes is not only a clairvoyance method, it is also an alphabet, the runic alphabet.