After Lord Brahmā advised the demigods to go to Lord Śiva and beg his pardon, it was suggested how he should be satisfied and how the matter should be placed before him. Brahmā also asserted that none of the conditioned souls, including himself and all the demigods, could know how to satisfy Lord Śiva. But he said, "It is known that he is very easily satisfied, so let us try to satisfy him by falling at his lotus feet."
Actually the position of the subordinate is always to surrender to the Supreme. That is the instruction of Bhagavad-gītā. The Lord asks everyone to give up all kinds of concocted occupations and simply surrender unto Him. That will protect the conditioned souls from all sinful reactions. Similarly, in this case Brahmā also suggested that they go and surrender unto the lotus feet of Lord Śiva, for since he is very kind and easily satisfied, this action would prove effective.