Religion is a major issue that causes enormous problems in Nigeria, because about slightly over half the country is Muslim, about 50.2% according to best estimates, and nearly all of the other half of the country are Christians, although there are still a small number of Nigerians who practice one of several pre-colonial native religions.
The nearly even split between Christian and Muslims has led to serious violence, approaching the level of civil war in some areas, however it is difficult to know how much religion really comes into play when Nigerian girls are looking to date foreign men.
It is worth mentioning that like most African nations there are some areas where you should be more careful about traveling.
Like many African nations Nigeria was once colonized by Europeans (namely the United Kingdom) but gained independence in 1960 from that same European power.
The best rule for Nigerian dating, like most things, to keep religion in the back of your mind, but do not let it sour everything.
Many Nigerian women are much less doctrinaire about religion than you would expect in such a conservative culture, and if you are religiously conservative you will probably be surprised by the beliefs of a religiously conservative Nigerian lady.
Nigeria is a country about twice the size of California located on the West Coast of Africa and is named after the river Niger which flows through it.
It's a great place to look for an African bride, because it has the largest population of any country in Africa, about 160 million or so.