Well-planned parking areas should have protected paths for pedestrians and those with disabilities to use. It's all too easy, however, to simply pave a strip to the side of the parking lot and do nothing else. This is certainly better than nothing. However, there are more features you can add as you plan and construct the walkway. You can also ask a construction service to add these features to existing walkways, too.
If the pathway is going to be raised, like a typical sidewalk, add a couple more curb cuts than you initially think you need. You want wheelchair users and others with mobility issues to be able to get onto the walkway quickly and without having to travel very far along the aisles inside the parking lot, to avoid conflicts with cars. Placing curb cuts only at the ends, or at the ends and middle of the walkway is very long, could be more annoying to users than you may realize. Remember, you'll need to plan parking space placement so that all of the cuts are unobstructed.
Adding bollards would be a good idea as long as they do not prevent people from moving into the pedestrian area. Bollards that are planted firmly in the concrete or asphalt—not temporary ones, as those won't stop or slow down vehicles—prevent absent-minded drivers from accidentally going up onto the curb or walkway. While each parking spot should have a horizontal concrete parking bumper at its end, those don't always stop cars from moving up and over them and onto the walkway. Construction crews can add these when the parking area and walkway are paved.
Distinguishing Paint Marks
One thing you might want to consider if the walkway's edge is hard to see (e.g., the curb blends in with part of the lot at night or in bright sunlight) is adding colored lines to the edge to show where people need to step up or down. Not every walkway will need something like that, but it is a consideration if visibility is bad. You don't want people tripping over the curb or a step.
Which one of these you add (or ones, if you decide to add more) depends on the lot's layout and other factors. However, you should give these options some thought to ensure everyone can safely access and travel on pathways out of the way of car traffic. The construction or paving company you hire can show you what options you have.