What is difference between Shrimad Bhagwat puran and Shrimad Bhagwat Geeta?

In Hinduism, always a mythological book name is being to be heard as "Shrimad Bhagwat". Many of us don't know that it is not a single book, this is the name of two book. One is called aa Shrimad Bhagwat puran and another one is called as Shrimad Bhagwat Geeta. Yes, Bhagwat geeta is the part of Shrimad Bhagwat puran. Then, a question arises in mind, what is Bhagwat puran. Shrimad Bhagwat puran is the complete Biography of Lord Krishna. From his previous incarnation to life story of Lord Krishna comes under Shrimad Bhagwat puran. And Shrimad Bhagwat geeta is the preaching of knowledge to Arjuna during Kurukshetra war. Shrimad Bhagawat geeta having 18 lessons. In shrimad bhagwat puran, two time lord krishna has preached. First time, he had preached to Udhav about Bhakti yoga, later which is known as Udhav Geeta. In second time, Lord krishna had preached to Arjun for various kind of knowledge about karma, Bhakti, sanyas and gyan yoga. Actual meaning of Bhagwat geeta is " Song from Supreme almighty". 

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