Why is sindoor offered to Ganesh?

Sindoor, or vermilion, is offered to Lord Ganesh as a symbol of auspiciousness and prosperity. It represents the energy of creation and is believed to invoke blessings for success and the removal of obstacles. Additionally, the red color of sindoor signifies vitality and protection, aligning with Ganesh's role as the remover of obstacles and the god of beginnings. This offering is a way for devotees to seek his blessings for a fruitful and harmonious life.