Leverage is virtual credit given to the client by the company, and it modifies your margin requirements, i.e. the higher the ratio, the lower the margin you need to open an order. Leverage can be changed later on Client Portal.
What leverage can I select?
You can select 1:1, 1:2, 1:5, 1:10, 1:100, 1:200 and 1:500 on MT5.