There are many reasons why cats like to meow, such as:
Hunger: Cats will meow when they are hungry or thirsty, reminding you to prepare food and water for them.
Cats crave attention: Sometimes cats want you to play with them or hold them. They will walk around you and meow, and even rub their heads against you.
Loneliness: If a cat is left alone at home for an extended period of time, it may meow for companionship and comfort.
Discomfort or pain: Cats may cry out due to physical discomfort or pain. At this time, you need to observe its eating, activity and excretion. If there are any abnormalities, it is best to take it to the veterinarian for examination.
Sexual desire: Unneutered cats may meow loudly during their heat cycle to attract the attention of the opposite sex. If you don't plan to breed them, you might consider having them spayed/neutered.

Seeking to go outside: Outdoor cats may meow to express their desire for the outdoor environment, which is a manifestation of their desire to explore and satisfy their hunting instincts.
Anxiety or unease: Cats may feel anxious due to changes in their environment, strangers, other animals, or other stressors. In this case, you need to give them some comfort and a sense of security.
Age-related changes: Older cats may start meowing more frequently due to declining physical function or cognitive impairment. At this time, you need to provide them with more love and comfort.
Of course, every cat has a different personality and habits. Sometimes their meowing might just be their way of saying "I'm in a good mood" or "I miss you." However, if you're unsure why your cat is meowing, or if you can't alleviate their meowing using the methods mentioned above, it's best to consult a veterinarian for professional advice.