There are several reasons on why ghosts busting are needed.
Not all Human Beings die naturally, such as old age and sickness. Some people die in accidents or committed suicide.
Human Beings that die in unnatural death will turn into ghosts and linger at the same location / premises where they died. Their souls are not allowed to enter the gate of hell as the actual date of death is not yet reach.
Souls died of unnatural death, such as committed suicide by hanging and self-drowning need to find human replacement, in order to be reborn.
In the West( Caucasians/Whites/ Farangs/ Ang Mo), who are mostly Christians, Free Thinkers etc will not know / understand or believe in ghosts.
Singaporeans will often hear/watch the news about same accidents/ same type of suicides occur at the same spots of the previous cases.
Once, the location which unnatural death has occurred and no Spiritual Salvation/ Cleansing(超度） is done, same type of deaths will appear again and again at the same spot because the ghosts of the previous death need to lure and influence the mind of the human folks with low energy/luck /moody and die like them, so that the previous ghost can move on for rebirth.
TALISMAN TO PROTECT YOURSELF FROM GHOSTS / BLACK MAGIC >> TALISMAN 4 U
In Western World, there is no such thing as "Spiritual Cleansing" of the haunted location.
It is also the same sad fact that in Singapore, the government do not order the "Spiritual Cleansing" of the location, where unnatural deaths had occurred. ( Anyway, it is considered good for Black Magic Practitioners to carry out their ritual to destroy/kill their enemies in Singapore, because in Singapore Law, there is no such thing as 'Someone use Black Magic to harm/kill him/her/me.')
Unless the kind-hearted people or the relatives/children of the dead engage the Spiritual Cleansing and Salvation service for the deceased from the Taoist Masters or Buddhist Monks , the place /location/premises will be haunted.
Taoist Masters or Sorcerers will carry out Ghost Busting either for self-interest or mainly for good cause.
Self-Interest is to catch and control the ghosts and get them to be their servants.
Good Cause is to do a Cleansing Ritual on the haunted place and Salvation Ritual for the ghosts to let them go through rebirth faster or send them to Western Paradise(In Buddhist Context).
Taoist Talismans shown below here belongs to Yin Shan Sect (阴山派). They are used to lure and capture the ghost.
The left talisman is to call upon/lure the ghost to enter the container/bottle by chanting the mantra and then to burn the talisman inside it. The ghost will enter the container/bottle.
The right talisman is to paste over the cover of the container/bottle to prevent the ghost from escaping.
At this point of time, the Taoist Sorcerer/Master can then decide to send the ghosts to a Yin Temple ( Temple of hell gods) and let the hell gods to handle the ghosts or bring the ghost for Spiritual Salvation Ritual, in order to has a faster chance of rebirth or send to 'Western Paradise' to practice Buddhism. The Taoist Master may also control the ghosts to help him do work.
If the Taoist Master decide to keep the Ghosts, there are many more talismans to be used, such as feeding the ghosts. There are also different talismans to control Male Ghosts and Female Ghosts.
To view Taoist Talismans on Ghost Keeping , Feeding and Worshiping:
Ghosts Keeping Talismans of Yin Shan Sect (阴山派)