Question

What was Dandi-yatra known for? How did it have its impact in other parts of India?

Answer 1

The Dandi yatra was for the law made against the salt taxes. Gandhiji and many of his followers denied it and started a yatra from a village Dandi up-to a coastal area were salt was being made. Other people of India also got the confidence to fight against the British salt taxes.

Answer 2

Hi !

Gandhiji sent a letter to Viceroy Irwin , which stated 11 demands.
The most important demand , which was needed by both rich and poor , was the abolition of salt tax. Irwin refused to react to  their demands. 
Hence, Gandhiji started the Salt march , accompanied by 78 trusted volunteers, on 6th April , and reached Dandi , and violated the law by manufacturing salt from sea water.

This march developed the feeling of nationalism , in people ,in different parts of the country.
They also broke the salt law , manufactured salt , and demonstrated in front of the govt. salt factories