Okay, so sometimes countries don't get along with each other and might want to cause problems for each other. One way they might do that is through something called cyberwarfare.
In Russia, some people who work for the government might try to use computers and the internet to do things like steal secret information from other countries, shut down important systems like power plants or transportation, or spread false information to confuse or scare people.
These people who do cyberwarfare might use things called viruses, which are like tiny computer bugs that can make computers stop working or do things they're not supposed to. They might also use something called hacking, which is when they try to break into other people's computers that they shouldn't be accessing.
Cyberwarfare can be really scary because it can cause a lot of damage without the military having to physically attack another country. That's why countries take it really seriously and try to protect themselves from it.