Was there any specific reason for why Seljuk Beig or the Seljuks as a whole converted to Islam? So I’ve been doing some research for a project I have planned about history and it requires me to figure out why the Seljuk Turks converted to Islam for an important part of it. 
What I’ve been able to find so far, has only said that Seljuk Beig converted to Islam, and does not expand on it further.  And so I was wondering if it is known why Seljuk Beig converted.

Thanks in advance.