In the dedication prayer, we are asking that the good merit generated from our practice be directed specifically to enlightenment for all beings.
If dedication prayers are not done at the end of offerings or prayers than the prayers just floats around without specific benefits.
Below is the simple and very effective dedication prayer written by the Great Kunchen Longchen Rabjam that can be recited after making the prayers.
༄༅། །བསྔོ་བ་ནི།
Dedication
by Longchen Rabjam
སངས་རྒྱས་བསྟན་པ་དར་ཞིང་རྒྱས་པར་ཤོག །
sangye tenpa dar shying gyepar shok
May the teachings of the Buddha flourish and spread!
སེམས་ཅན་ཐམས་ཅད་བདེ་ཞིང་སྐྱིད་པར་ཤོག །
semchen tamché dé shying kyipar shok
May all sentient beings find happiness and joy!
ཉིན་དང་མཚན་དུ་ཆོས་ལ་སྤྱོད་པར་ཤོག །
nyin dang tsen du chö la chöpar shok
May they practise Dharma day and night!
རང་བཞན་དོན་གཉིས་ལྷུན་གྱིས་འགྲུབ་པར་ཤོག །
rang shyen dön nyi lhün gyi drubpar shok
And may our own and other's aims be spontaneously accomplished!