Surah Yasin is the 36th surah in the Quran. This is a Meccan surah and is considered one of the most important surahs in the Quran. The name of this sura is taken from the letter "Yes" which appears at the beginning of the sura. This surah is considered as one of the most beneficial surahs to read and memorize, because it is believed to provide many good things for its readers. This Surah contains religious teachings, warnings for non-believers, as well as teaching about the Day of Resurrection.

Surah Yasin and Tahlil are two different things, but they can be combined in one worship service.

Surah Yasin is the 36th surah in the Quran and is considered one of the most important surahs.

While Tahlil is a form of dhikr that says "La ilaha illa Allah" which means "There is no God but Allah". Tahlil is often done at funerals, or especially on certain days such as Fridays and Islamic holidays.

On special occasions such as funerals or tahlil arwah, surah yasin and tahlil are often recited as prayers for the spirits who have died.

Tahlil rituals in society tend to vary depending on local traditions and customs. However, some of the tahlil rituals that are commonly performed in society include:

Tahlil arwah: Tahlil performed for the soul of someone who has died, usually done on the first night after death, or on certain days such as Fridays or Islamic holidays.

Regular Tahlil: Tahlil that is done regularly, usually on Fridays or certain days such as Islamic holidays.

Tahlil at the mosque: Tahlil which is done in the mosque, usually after the Maghrib or Isha prayers.

Tahlil at home: Tahlil that is done at home, usually by family or friends who want to pray for the spirits of the deceased.

Tahlil at the cemetery: Tahlil that is done at the grave, usually done by family or friends who want to pray for the spirits of the deceased.

In general, the tahlil ritual is performed to remember Allah and pray for the spirits of the deceased. However, in some areas there may be differences in how this is done.

The guide for doing Tahlil is as follows:
1. Purify from large and small hadas before doing tahlil.
2. Read a prayer of intention, for example: "I intend to do tahlil for (the name of the person being recited) with the aim (as you wish) that Allah will accept his practice"
3. Reading the tahlil "La ilaha illa Allah" (There is no God but Allah)
4. Read as much tahlil as desired, usually 100 times or more.
5. Read prayers such as the opening prayer of the Qur'an or other prayers as desired.
6. Then close with greetings and sit for a while before standing up.

That is a general guideline for doing tahlil. However, if you want to do tahlil for a special event, such as a funeral or a spirit recitation, surah Yasin and tahlil are usually recited as a prayer for the spirits who have died.

It should be remembered that doing tahlil is not just saying the phrase "La ilaha illa Allah", but it must also be done with a sincere and humble heart and it cannot be used for bad purposes.