Ketu as the mokṣa-karaka is the giver of emancipation of every kind. Most astrologers only look at the spiritual aspect of freedom from rebirth, which truly is the penultimate goal. But there are many types of bondages and one seeks freedom from these or protection from it. Something like jail term for something wrong done or being trapped when you are not the one who committed the crime.
Either way, you need Gaṇeśa as the devatā of ‘Ketu’ for this freedom activation.
Various Bija Mantra for Ganesha. Note that the dhyana bija is the second syllable like गं (gaṁ) or गः (gaḥ).
The Ganesha yantra is drawn based on the teachings of Sri Narada in the ‘Ganesha dvadasanama stotra’. The twelve petal lotus is symbolic of the heart lotus and the door of this heart lotus is guarded by Ganesha.
This is the dancing form of Ganesha and the meditation etc, visualize Ganesha in a rather jovial, compromising mood. Ucchista Ganesha is worshiped to remove domestic disharmony and the relationship with spouse is improved. All sorts of troubles with in-laws etc vanish and the family gets together and lives happily. For the last two decades we have advised the placing of a statue of dancing Ganesha (idol) near the headstand of the bed and the relationship between couples has improved.
Sri Ganapati is the elephant headed son of Sri Shiva, belonging to the divine family that delivers the soul from darkness and sin, the specific function of Sri Ganapati is to teach and drive away ignorance (avidhya). He is represented by Ketu, the significator of emancipation from all kinds of bondage including rebirth.
The Beejakshara of Sri Ganapati is ‘gaM’
Bīja mantra: गं (gaṁ) which is also called the Gītā bīja (for Srimad Bhagavat Gītā) by those learned in mantra śāstra.