Members of the Scottish Parliament are called MSPs.
Each voter in a Scottish election has two votes, a constituency vote and a regional vote.
Scotland is made up of 73 Scottish Parliamentary first-part-the post constituencies and eight regional constituencies.
An MSP elected by the first-past-the-post system is called a constituency MSP. This results in 73 constituency MSPs.
Each of the eight regional constituencies returns seven MSPs using the
d'Hondt systemof proportional representation.
This results in 56 regional MSPs representing a region of Scotland rather than a single constituency.
In all, 129 MSPs are elected to the Scottish Parliament.
MSPs may take on ministerial roles if their party has a majority or is part of a coalition which has a majority.
Other MSPs hold the Scottish Government to account in Holyrood's plenary sessions on Wednesday afternoons and all day on a Thursday.
They may also join committees, where they scrutinise new legislation or conduct inquiries into issues which fall within their remit.
Committees can also propose new legislation in the form of a committee bill.