The secret of great Mantra "Shri Krishnaha Sharanam mama" that is uttered, is stated as under :-

Shri - Entitles one to obtain good fortune, to get wealth and loves to get Political Power.

Kri - Brings an end to Sins.

Shnaha - Drives away from three - fold afflictions i.e. Adhiyatmik, Adhibhautik and Adhidaivik.

Sha - This will grant freedom from the cycle of birth and death.

Ra - Gets acquainted with the knowledge of relationship with Brahma, World and individual Soul.

Nam - Obtains unflinching devotion in Shri Krishna.

Ma - Encourages ardent love in preceptor who teaches seva.

Ma - Gets 'Sayujya' Salvation with Shri Hari (that is intimate union with god).

Shree Krishna Sharanam Mama can be recited anywhere and at anytime as it does not start with Omcar. Prayer which involves omcar cannot be recited in an impure state according to the scriptural laws. With the grace of god we were blessed with this divine mantra so we wouldn’t miss out on bhagvad naam even for a second in this era “Kalyug”.

Story...

In Kunj Shri Thakorji and Svaminiji were involved in a maan lila and during this play the utmost beautiful swaroop of svaminiji appeared from within Shri Thakorji heart on his chest and the most attractive swaroop of Shri Thakorji appeared on her chest, the burning fire of their passionate desire for reunion emerged in the shape of Shri Vallabh who witnessed the divine couple's entire lilas.

He escorted Svaminiji to Shri Thakorji and feeling thrilled by the reunion of the divine couple, the first thing he said was; “Shree Krishna Sharanam Mama”. Following Thakorji's wishes, Shree mahaprabuji came on earth and gave vaishnavs this mantra at the time of initiation.