The most likely reason that a cat follows its owner around is that she wants to show her owner affection, according to Catster. The cat may simply want to be in the same room as its owner or in close proximity to its owner at all times.
Another reason that a cat may follow its owner is that she senses that something is bothering her owner. Typically when a cat senses this, being in close proximity to her owner is her way of showing emotional support, explains Catster. Additional reasons include that the cat may also be in need of food or water, or she may need her litter box to be cleaned.