Lord Ganesha occupies a special god status in Hindu tradition, and is considered as the bestower of all  auspiciousness and destroyer of all negativity. Typically these festive celebrations last from one to 11 days,  concluding with a Nimajjan ceremony (immersing the deity in the waters of lake/pond/river/sea/ocean etc). These celebrations are splendidly carried out in India amidst strict security as thousands participate. However; several Indian Hindu communities spread across the globe from Australia to North America have celebrated with no less pomp.
Lord Ganesha is important for Hindus.