Opinion polls

In recent opinion polls done by ipsos synovate state that if Kenya could conduct elections today president Uhuru Kenyatta would still become Kenya's president with 47% of Kenyans who may vote for him all over the country.

Whereas the leader of opposition raila odinga would be voted by 42% of me yans all over the country, 8% of Kenyans said that they were not decided of who to vote for the opinion poll also suggested that if elections were to be held today there would be a run off since no aspirant would reach 50+1 votes.

My question is are these opinion polls factual? Can they be trusted by Kenyan's and what is the credibility of such opinion poll institutions?

I have done my research and found that Kenyans do not rely so much on these polls,this is because they state contrary to the final results ,for example in kiambu the polls stated that William kabogo would be the winning candidate in previous jubilee nominations but that was not the case during nomination results.

Some of these polls maybe to favour politicians for their own interests such as to gain fame and more support from Kenyans,this happens not only in Kenya alone ,but in recent USA elections opinion polls suggested that Hillary Clinton was always ahead of Donald trump

But during announcing of the presidential results the whole world was shocked when Donald trump was announced as the presidential winner.the opinion polls should base their information on facts as collected.