How do you upgrade spells in Clash of Clans?

Answer 1

Upgrading buildings and troops in Clash of Clans is all a matter of personal opinion but one opinion is that building the Town Hall is the most important thing because you can only upgrade things such as the Gold and Elixir Collectors as well as the Laboratory only to a point until it becomes maxed out at your current Town Hall level. After upgrading your Town Hall your Clan Castle should be upgraded until it's at least Level 3 if you are in a clan so your clanmates can send you a Dragon for a single reinforcement which hits hard damage-wise.

Answer 2

By gaining experience. You get exp. by performing a variety of different activities in game such as completing missions or achivements , upgrading your troops, donating your troops, upgrading your town hall etc. The more experience you earn the higher your level becomes.

Answer 3

You upgrade them on how you would normally upgrade troops, and this is done by going to the shop and buying a reseaech center

Answer 4

Go to the laboratory and you will find an option to upgrade the spell. From there you can upgrade all your spells. Spells affect the outcome of the game greaty so dont forget to use them.