"Paved surfaces" refer to areas that are covered or constructed with a hard, flat material such as concrete, asphalt, or stones. These surfaces are smooth and solid, allowing for easy walking, driving, or other activities. Full definition
This stroller seems to work best on paved surfaces and therefore might have difficulty manoeuvring on softer surfaces such as grass or sand. (parenthood.guide)
Whenever possible, walk your pet on grass or dirt instead of paved surfaces on hot days since they can result in pad burns which cause blisters, extreme pain and even tissue loss. (mypetneedsthat.com)
Locking them into position is very useful if you are going on the beach or on soft or uneven ground but they are better left unlocked when traveling over paved surfaces. (strollerdiva.com)