Question

what do know about IAS.write a big note on it

Answer 1

Every day, we get queries from a lot of IAS aspirants regarding UPSC exam guidance. Many ask from where should they start the UPSC preparation. With mushrooming coaching institutes and a plethora of materials available online and offline, their worries are only compounded. We at Clear IAS™ (www.clearias.com) believe that it is very important to address the basic queries of all freshers. Yes, that’s why we are here.

ClearIAS provides free IAS online coaching, guidance, strategies, books, online study materials and mock tests with a vision that no candidate should be left out of UPSC exam competition due to the inaccessibility of expensive IAS classroom coaching. 

Answer 2

Full form of IAS is Indian Administrative Services

The Indian Administrative Service is the administrative civil service of the Government of India. The IAS officers are recruited through the exam of Union Public Service Commission (UPSC), which is considered very difficult. These officers hold key positions in the Union and State governments. 
The Indian Administrative Service is one of the 3 All India Services :-

Indian Administrative Service (IAS)
Indian Police Service (IPS)
Indian Forest Service (IFS)

These Officers deal with district affairs, law and order of their division, general administration and development work. This is a really secure and top-notch job which includes facilities like - housing, medical, conveyance and more, along with a high and lucrative salary.