Unit 3 and 4

Unit 3 : Glossary
Choices: an act or the possibility of choosing
Charge: o ask an amount of money for something, especially a service or activity
Brand: a type of product made by a particular company
Saving up: to keep money so that you can buy something with it in the future
Sales: the number of items sold
Discounts: a reduction in the usual price
Bargain: something on sale at a lower price than its true value
Can't afford:  If you cannot afford to do something, you must not do it because it would cause serious problems for you
Is it worth?: Merece la pena

Unit 4 : Glossary 
Amusing:  entertaining
Annoying: to make someone angry
Embarrassing: making you feel embarrassed
Upsetting: making someone feel worried, unhappy, or angry
Worrying: making you feel unhappy and frightened
Unplug: to take the plug of a piece of electrical equipment out of the place where it is connected to the electricity supply
Update: to make something more modern or suitable for use now by adding new information or changing its design
Swipe:  to hit or try to hit something, especially with a sideways movement
Scroll: a long roll of paper or similar material with usually official writing on it
Squeeze: to press something firmly, especially from all sides in order to change itsshape, reduce its size, or remove liquid from it