What is No, confidence motion?

No Confidence Motion also called as Motion of No Confidence, a Vote of No Confidence is a formal proposal in Lok Sabha to evoke a decision of the house. No Confidence Motion can only be introduced in the Lok Sabha. 
The “No Confidence Motion” is an important tool against the Council of Ministers (COM) in the Lok Sabha. If 51% of the members of the house vote in favour of the “No Confidence Motion”, it is passed and the Government is deemed to have lost majority and has to resign from office. The Government has to prove its majority in the house either by bringing in a vote of confidence or the opposition can ask the Government to prove its majority after it brings a “No Confidence Motion” .
At times, the opposition also brings the “No Confidence Motion” to force the Government to discuss important issues.