In Hindu temples we can see that many people does Dandvat Pranam.

Why it is consider as more important than normal namaskara mudra ?
In Hindu temples we can see that many people does Dandvat Pranam.

Why it is consider as more important than normal namaskara mudra ?
So Krisna worship, mad-yaji, worshiping Krisna... Krisna says, "Worship Me." What is that? Mam namaskuru.
If you simply come in this temple and offer little obeisances, dandavat... Danda, danda means "rod"; vat means "like."
Just like one stick falls straight on the ground, similarly, if we fall straight before the Deity, that is called dandavat, "like the stick."
Dandavat-pranama. Prakrsta-rupena namrata. Namrata is required. Jnane prayasam udapasya namanta eva. Namanta. Be submissive. So this dandavat is the symbolic presentation of submission.
And Krisna wants that sarva-dharman parityajya mam ekam saranam vraja [Bg. 18.66], submission. The bhakti process is simply submission. So mad-yajino 'pi yanti mam [Bg. 9.25].
Those who have not studied Vedic literatures. The temples are installed for this(Dandavat-pranama) purpose. If somebody comes, simply offers his obeisances before the Deity or before the spiritual master simply by doing that(Dandavat-pranama), he will become perfect.
Source: Prabhupadavani