It allows voters to verify their vote through a printed receipt - This is true.
VVPAT systems provide a printed paper slip that allows voters to verify whether their vote was recorded correctly, which increases transparency in the electoral process.
Goa is the first state to use VVPAT in all constituencies - This is true.
In the 2017 Goa Assembly elections, VVPAT was used in all 40 constituencies, making it the first state in India to fully implement VVPAT.
It was first introduced in the 2014 general elections - This is true.
VVPATs were first introduced on an experimental basis in the 2014 general elections, though not in all constituencies.