“Clash of Clans is three years old! You can now boost all your resource collectors for one week for only one gem each until August 7th!”
Gold is a resource that is dug up by gold mines. Once collected it is stored in your gold storages. The amount of gold you have is displayed at the top right side of the screen. Gold is used to build and upgrade defensive buildings, traps, elixir collectors, elixir storages and walls. It is also used to place national flag decorations.
According to inquisitr.com, taking advantage of the latest gem boost, users with a level nine Town Hall can spend a total of 14 gems to double production in six gold mines, six elixir collectors, and two dark elixir drills. The advanced users with a level nine Town Hall will need just 17 gems to double the production of their seven gold mines, seven elixir collectors, and three dark elixir drills. Once the gems have been spent to begin the boost, the seven-day clock begins on each of the collectors, signifying how long the doubled production is going to last.
Elixir is a resource that is collected by elixir collectors. Once collected it is stored in your elixir storages. The amount of elixir you have is displayed at the top right side of the screen under gold. Elixir is used for purchasing and upgrading troops, army buildings, dark elixir storages, dark elixir drills, gold mines and gold storages. It is also used to place many decorations.
Gems can be used to purchase gold, elixir, dark elixir and builder's huts. They can also be used to speed up upgrades, gold/elixir collection and to finish troop training.
or select it from the taskbar. (You’ll need an Internet connection and a Microsoft account.) Use Search to quickly find what you’re looking for, or browse top charts, categories, and custom collections.
See it in action
on the taskbar. You'll find your most used apps on the left, the All apps list, and shortcuts to other locations on your PC, like File Explorer and Settings.
to save your favorite articles for later, then read them in reading view 
. Plus, Cortana is built in to Microsoft Edge to help you do things faster and easier.
