A modular kitchen is simply a modern and flexible way to design your kitchen, allowing you to choose a variety of cabinets for different functions which come in "modules." The modules are available in different sizes which can suit various functions depending on which area of the kitchen you would choose to use the module. They are also available in any number of colors, styles and finishes which can affect the price, but also means that you will be able to find the right style to suit the look and feel you are trying to achieve in your kitchen.
Modular kitchens tend to be quite popular with people who have limited space, like people who live in terraced homes flats, or generally any home with a very small kitchen. Being able to choose the types of cabinets you need in your space means that you can avoid bulky cabinets that don't compliment your space and suit your needs. Instead, you can focus on the most effective units that will help you to save space, yet that also allow you to make the best use of the space that you have available.