Unconditional love is to love someone without any expectation of return of anything, including love. Conditional love is based on the expectation of return of something. It is rare to find someone who gives unconditional love to someone. We all love others with an expectation of something in return. Love has become a commodity these days.
Some parents love their children unconditionally but it is again rare to find such parents. Just to have the expectation that our children should do what we want them to do is also a condition. Our conditions should not become an obstacle in their all round good growth. The conditions should not become the limiting factor for them but they should act as good guidelines to lead a virtuous life.
Only God loves all of us unconditionally. In spite of our repeated wrong deeds, He never stops loving us. He even equally loves the most dangerous of criminals.