There are some people in the Philippines who practice a religion called Islam, which is different from the religion that most people in the Philippines practice, which is called Catholicism. Some of the Muslim people in the Philippines feel like they haven't been treated fairly and that they don't have the same rights as other people in the country.
Because of this, they have formed groups that want to rebel against the Philippine government and create their own independent Muslim state in parts of the country. This is called an insurgency, which basically means a rebellion or uprising against the government.
The Philippine government has tried to negotiate with these groups, but sometimes they use violent tactics like bombings and kidnappings to get their point across. This is really dangerous and can hurt innocent people who aren't involved in the conflict. So, the government has to use their own military forces to fight against the insurgents and protect the people who live in those areas.
It's important to remember that not all Muslim people in the Philippines are involved in this insurgency and many of them just want to live peaceful lives like everyone else. And it's always better to try and talk things out rather than resorting to violence.