Is income from Google AdSense halal?
بِسْمِ اللهِ الرَّحْمنِ الرَّحِيْم
In the name of Allah, the Most Gracious, the Most Merciful
Income from Google AdSense is permissible as long as the ad is posted on your website is not unethical or of impermissible nature such as promoting any vices or shameless actions or images. This is the same as advertising for a merchant through various means. It should be remembered that one should refrain from using it on videos due to the difference of opinion between the scholars regarding videos and the content.
Only Allah knows best
Written by Maulana Shadman Ahmed
Checked and approved by Mufti Mohammed Tosir Miah
Darul Ifta Birmingham
 Radd al-Muhtar, volume 6, page 42