What is arbitrage?

Arbitrage is nothing else than buy asset on exchange "a" and sell it with profit on exchange "b". For example you spotted a price of ethereum on coinbase for $300 but on binance the price is $350 so you buy eth on coinbase and send it to binance sell it for $350. In this example you make a profit of $50 but you need to act fast because the price can change very fast. Remember do not use the exchanges with low ranking and low volume because you can lose your funds.

Arbitrage is purchase of a good or an asset on a market where its price is relatively lower in order to simultaneously resell that good or asset on another market where its price is relatively higher. Such a transaction is carried out without risk. The essence of arbitrage is to notice the difference in prices of the same product on different markets or on the same market. If this difference is greater than the transaction costs, the investor, buying the product on the cheaper market and selling on the more expensive market, makes a profit.

Arbitrage leads to limitation of the price difference of the same good or asset on different markets to the margin depending on the size of transaction costs, thus increasing the efficiency of markets.

In banking it is a buyout of securities on the markets, where quotations of given assets are beneficial, in order to resell them with profit on other markets. In financial mathematics, arbitrage is the strategy of buying or selling securities, currencies, commodities or financial derivatives with a positive probability of profit without the risk of loss.