What is a conventional mortgage?
A conventional mortgage is a home loan that is not insured by a government agency. Most follow Fannie Mae and Freddie Mac guidelines, which is why they are also called conforming loans.
Because there is no government guarantee, approval leans on your credit, income, and down payment. In exchange you get the most flexibility: you can buy a primary home, a second home, or a rental, and choose a 15, 20, or 30-year fixed rate or an adjustable rate.