They can be used virtually on any type of surface. Tiles are very comfortable to walk on and relatively smooth which makes it safe to use. Hence, there will be little fear of people tripping on any part of it. In addition, patio furniture will sit squarely on the tiles surface, that may not happen if you use another type of patio materials.
When you are figuring out your budget for the patio, you must take into account the maintenance costs of each different type of patio material. You may find that you are better off choosing a more expensive but durable patio materials up front rather than choosing a cheaper one that has a higher average maintenance cost. Also, make sure that you include into your budget for any additional walkways or paths that need to be built.
Including built-in seating : Patio designs incorporating built-in seating with pergolas and outdoor fireplaces look very chic and transform the patio into an outdoor room. It is also a great way to make use of all available space in a very small garden. This solution is convenient if you don't want to shuffle around with garden furniture. However, the position of the seating is fixed and restricts how you can use the patio. The space is less flexible as seating cannot be varied to turn a dining area into a lounging area.
Consider the long term practically and maintenance of patio materials carefully....Most people only think about materials in terms of the cost but that should not be your only consideration. You don't always require the cheapest patio material. On the contrary, you also need to think about what patio materials are going to last for a long time and what kind of maintenance each type of material needs.