Ikhtilaf is a big word that means "differences of opinion." It's like when you and your friend can't decide what game to play, or what color is the best. Ikhtilaf happens when people have different ideas about something, and sometimes they can't agree on what is right or wrong.
In grown-up world, this often happens when people have different opinions about what their religion teaches, or how they should live their lives. Muslims, for example, might have different ideas about how to pray or what foods they should eat. And sometimes these differences can lead to arguments or fights.
But it's important to remember that just because people have different opinions doesn't mean that they can't be friends or get along. We can learn from each other and respect each other's beliefs, even if we might not always agree. So instead of getting upset about ikhtilaf, we should try to find common ground and ways to work together.