In what way did Mahatma Gandhi transform the nature of the national movement?

Gandhiji transformed the nature of the national movement by the following thoughts, methods, ideology, working styles, movements, etc.
(a) Gandhiji returned in January 1915 from South Africa and till the last day of his life (30 January 1948) conveyed his philosophy and main principles through various mediums. The main principles of his philosophy or fundamental principle were–(i) Satyagrah, (ii) Non-violence, (iii) Peace, (iv) True sympathy for the poorest, (v) Empowerment of the lady, (vi) Communal harmony, (vii) Indian rural area and to think about interest of the people residing in villages and to motivate the other people to think, to act and to inspire resourceful and influential high up of the society in favour of downtrodden.

(b) To stress importance of cottage industry, charkha, spinning wheel, khadhi, etc were stressed to be adopted and favour by all Indians. He oppose to colour discrimination and racial discrimination alike. He put a dress of ordinary people and use language and dialect use by the common men of the Indian society as far as possible. He published the Harijan newspaper and wrote in different newspapers, journals and very simple English (language) as well as Indian languages also.

(b) When Gandhiji returned to motherland in 1915, infact that time still Indian National Congress was confined in only urban areas and upto people of middle educated classes. Its influence was limited upto some towns and cities. Gandhiji knew very well that India is a country of villages. Its natural power rests with the rural people, labour, ordinary men and women, and young boys and girls till all sections and people of Indian society would not join freedom struggle against the colonial British power then it would be very difficult to finish British authority from India in peaceful non-violent movement, Satyagrah, procession, writing articles etc.

(c) Gandhi through his speeches, writing articles in magazines-newspapers and books expressed the colonial power that they have rewarded India throughout spreading poverty, hunger, low quality of life, illiteracy, superstitions and social disunity and disharmony Only British rule is responsible for all these ills of India because the British have not exploited India politically since years and years together but they have also exploited India economically, socially, culturally and spiritually also.

(d) Gandhiji also knew very well that till he would not rise his voice in favour of farmers, labourers and ordinary people and against foreign government till then they would not extend their full cooperation to the nationalists.