Dual listing is the listing of any security on two or more exchanges.
The main advantage of dual listing is access to additional capital and increased liquidity.
A popular way of dual listing for non-US companies in the US is to use ADRs or American depositary receipts.
Given exchange rates and other complexities, share prices should remain the same on both exchanges. If not, the arbitrator will bring them together.
Some companies find it difficult to track the trading of their shares in two markets at the same time and may need to initiate separate marketing and investor relations plans.