LaGomera is part of the Canary Islands which are in the atlantic Ocean off Morrocco. These islands are part of Spain. Spain is part of the European single currency the Euro. Each euro is made up of 100 cents. There are 7 euro notes 500, 200, 100, 50, 20, 10 & 5. Each is a different colour and size. There are 8 different coin denominations 2 and 1 euros then 50, 20, 10, 5, 2, and 1 cent coins.
These coins feature a common European design on one face and a country specific design on the other. In Spains case he effigy of King Juan Carlos I.
Euro notes and coins can be used in each of the nineteen member states, Austria, Belgium, Cyprus, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Portugal, Slovakia, Slovenia, and Spain
Credit and Debit cards are widely used on the Island, most ATM's are members of either the plus or cirrus networks so you should have no trouble withdrawing cash. It is important to be aware that cash tends to be the more common medium for small transactions and ATM's are only available in the main towns on the Island.