One day I was just playing Clash of Clans, and I was raiding someone. Then on my screen it said that a shield was activated. After the battle I went back to my village and I saw I had a shield activated. I didn't even go to the store and look at the shields section. (It is not the 3 day noob shield.) I was really confused. (I have a level four town hall.) Can someone help me?
The definite answer is no. Shields can only be acquired in specific ways. According to The Clash of Clans wiki of Shields, these are the ways you can get shields:
Beginning the game.
When you first begin playing Clash of Clans, you are given a 3-day shield. Once the shield expires, you will have to manually purchase shields.
Be a victim of a successful raid.
If your village is attacked by another user, you will gain one of the following:
- If your village is raided with 0-29% destruction and the player dropped at least 1/3 of his/her total current troop space, you will receive a village guard depending on your current league
- If your village is raided with 30-59% destruction, you will receive a 12-hour shield plus the equivalent village guard time (i.e. If you are in Gold League for example, your total "shielded time" is 12 hours and 30 minutes, with 12 shield hours and right after your shield expires, 30 minutes village guard time.)
- If your village is raided with 60-89% destruction, you will receive a 14-hour shield plus the equivalent village guard time
- If your village is raided with a 90% or more destruction, you will receive a 16-hour shield plus the equivalent village guard time
Purchase shields through the store.
Shields can be purchased through the store with Gems.
A 1-day shield costs 100 gems, and takes 5 days to cool down.
A 2-day shield costs 150 gems, and takes 10 days to cool down.
A week-long shield costs 250 gems, and takes 35 days to cool down.
So, the most probable answer is that your village was unsuccessfully raided but with a destruction amount above 29%. And in conclusion, shields cannot be activated automatically unless an event such as the ones mentioned above take place.