Unconditional Love

In 2013 Katy Perry released a song titled "Unconditionally" in which she stated that she would love someone unconditionally. What did she mean by that?

Anyway, what does loving a person unconditionally mean to you?

Since we have started dealing with the conditional sentences in English and St. Valentine´s day is here, I would like you to explain what unconditional love is and to finish this hypothetical sentence (2nd conditional) in the comment section.

I would love you the same even if you .....