It is difficult to explain the question you have asked in a short letter. However, I shall try to explain you briefly.

The renunciation must be always natural, rising with the desire for realization of God. Markata means - monkey. The monkey is always restless. Sometimes a man is not at all inclined to spiritual life. But, a sudden tragedy at house such as death of a dear one makes him loose interest in life and he wants to renounce the world. Such renunciation will last only as long as that grief remains in his mind. After sometimes again he gets interested in worldly life and forgets all about his renunciation. Such a renunciation is called Markata Sannyasa.