The permissibility of using Google AdSense in Islam can vary depending on several factors, including the nature of your content, the types of ads displayed, your intention, and the interpretation of Islamic principles by scholars. Therefore it is neither halal or haram but it depends on the factors.

“Kufr” is an Arabic term in Islamic theology that generally refers to disbelief or unbelief in Islam. It is often used to describe the rejection or denial of the core beliefs and principles of Islam. There are different kinds or levels of Kufr in Islamic jurisprudence:

Kufr asli (Major Kufr): This is the most severe form of disbelief, where a person consciously and knowingly rejects Islam and its fundamental beliefs. It includes those who openly declare their disbelief in God or the Prophet Muhammad.

Kufr in action: This refers to actions that may not necessarily involve a complete rejection of faith but are considered acts of disbelief. For example, performing acts of worship to other than Allah (shirk), insulting the Prophet Muhammad, or mocking Islam can be considered Kufr in action.

Kufr by omission: This involves failing to believe in a fundamental aspect of Islam or neglecting a duty. For instance, denying the existence of angels or not praying regularly could be considered Kufr by omission.

Kufr al-juhud (Rejectionist Kufr): This is when someone denies the truth of Islam despite having full knowledge and understanding of it. It’s a deliberate and obstinate rejection.

Kufr al-nifaq (Hypocritical Kufr): This refers to hypocrisy, where a person outwardly professes belief in Islam but inwardly conceals disbelief or harbors ill intentions towards Muslims.