So I have many questions but I will start with this one. There seem to be many different types of fasting depending on why and for whom one is fasting.

If one was going to fast for shivaratri as an example what does one have to give up? Or it that decided by the devotees? Ive read some ppl qhen fasting only eat fruits,some only eat one meal a day. Some eat but nothing with salt.

Are there rules to fasting?