How to intimidate attackers with your base?

The first thing that intimidates attackers are DEFENCES.

The greatest defence that intimidates is the wall. The colour of your wall will decide whether the attacker stays or leaves your base. The other thing that can send them away is the level of your Wizard Tower and Mortar. Most people are afraid of high level splash defence and skip orLightning spell one or two of the splash damage towers. If those towers are high up in levels then they can take out most armies much better.

Lastly is the Cannons and Archer Towers. They still intimidate attackers, but not as much as the factors above. People will be less likely to attack with Giants if your Cannons and Archer Towers are higher upgraded.

Bonus: Upgrade your air defence and Archer Tower to stop most air attacks. The most popular air attacks you will get is around 20 Balloons and 60 Minions. If your air defence and Archer Towers are up to date and your air bombs and Seeking Air Mines are well placed then defending from air attacks will be a cinch.