Literally, itikaf means waiting somewhere and stopping.
Whether good or bad, it means binding the soul to something.
Religiously, it refers to a Muslim abandoning outside relations and cares and staying in a mosque for some time with the purpose of worship.
In the 187th verse of Chapter al-Baqarah of the Qur'an, it is
stated: “...do not associate in intimacy with them (your wives)during the period when you are in retreat in the mosques...” ; so itikaf is a type of worship which is present both in the Qur'an and in the Sunnah (the practice of the Prophet).

Aisha, may Allah be pleased with her, explains:
The Messenger of Allah, peace and blessings upon
him, would perform itikaf on the last ten days of
Ramadan. He continued it till he passed away .
(Bukhari, Itikaf: 1; Muslim, Itikaf: 2)
When the last ten days of Ramadan came, Allah's
Messenger (PBUH) would collect himself, make good
use of the night, and wake up his household. (Bukhari,
Qadr: 5)

Conditions before one can perforn Itikaf

Being Muslim: The first condition to performing itikaf is that the person be Muslim

Must be of sound mind: What this means is that a person must be able to make reasonable and rational thoughts and decisions. To explain further, a person may not be drunk or under the influence of drugs that may alter their state of mind. Also, a person who has a mental illness where they cannot make decisions on their own does not perform itikaf.

Niyyah: This means intention. One must have the intention to participate in itikaf for the sake of Allah, not for the sake of being seen by others. Your intention must be pure and focused on worshiping and pleasing Allah.

Permission: Women need to ask permission from their husbands before performing itikaf.

Performed in masjid: It is mentioned in Surat al-Baqarah 2:187 that itikaf is performed in a masjid. While some may say it is okay to perform itikaf at home, especially for women, most scholars agree that this is simply not the case at all, because the Qur'an says otherwise.

State of wudu: One must be in a state of wudu (purification/cleanliness) to participate in itikaf. If a person's wudu is nullified, such as using the bathroom, then the person must wudu before continuing itikaf. Although, if during sleep, one has what is called a wet dream, one's itikaf is not nullified but one must ghusl (full body purification) before continuing itikaf.

Fasting. One must be a fasting muslim to perform Itikaf


Virtues Of Itikaf

1 Renewing Your relationship with Your Creator
2 Having the Opportunity to witness Lailatul-Qodri a night better than a thousand month
3 Having Enough time to Worship your creator
4 Being able to doing away with sins in seclution and from seeing/hearing, saying bad things. etc

SOME LOCATIONS YOU CAN PERFORM YOUR ITIKAF

ILORIN
Ilorin central mosque Oja'ba
Darul Kitab Wa Sunnah Mosque Gaa Akanbi
Lawal Mosque GRA

ADO EKITI
Ansaru D'deen Central mosque, Odotu street Ado Ekiti.
Ahmadiyyah Central Mosque Ijigbo Street Opposite Fayose Market
Police headquarter Central mosque Iyin road Ado Ekiti

LAGOS
Lagos central mosque
Lekki Central Mosque
NASFAT Mosque Fashoro, Fashoro Street, Surulere, Lagos etc

IBADAN
UI central mosque
Ibadan Central Mosque
Arisekola mosque in iwo rd

Note that Itikaf cannot be performed except in a mosque where Jummah prayer is being performed.

Itikaf starts today's evening pls move to FP as soon as possible to benefit the Ummah