Artificial plants are considered to be beautiful and practical decorations. It is a commendable replacement for natural plants plus the advantage of not having to wither or die in a couple of days. Unlike the real ones, they could last a lifetime if properly taken cared of. They can easily be cleaned and disinfected, especially nowadays, there's a vast majority of fake plants that are made of plastic or fabric. Soaking them in a water solution, rinse and air dry is enough to keep these artificial plants clean.
With real plants, they will need regular water and trimming as wel as fertilizers and pesticides to make sure that they look good all year round. That is of course tiresome because it needs your time and effort. There are virtually no additional actions required for indoor or outdoor artificial plants to keep them looking good than the occasional cleaning. Silk plants and artificial trees are cleaner inside our home because they don't shed leaves and there is no chance of water spillage.
To sum it up, using artificial plants at home means convenience. They remain bright and vibrant when the real thing would loose its color, become limp and flaccid and generally starts to fade away.