Do you prefer Linked in or Bayt as a professional platform ?

Both are good. I use them simultaneously.

for me, Linkedin is the best

I think there are some differences between the two sites. Linkedin has a social interface that focuses on relations & connections but Bayt focuses on CV & available jobs. So I think both of them are required for finding jobs.

Linkedin , because I never got a job offer from bayt and i think it made for shown but not real jobs not like linkedin 

both of sites is good actually but for linked in it is more international and have more professional  

Linked is useful simply because of it popularity...  If bayt able to drag more users, then it is obvious that it also be useful as well.

I agree with the answer given by Mohammed Borham   Senior Procurement Engineer .