The process of diesel particulate filter regeneration mainly happens without the driver even knowing. But first you need to be clear what DPF regeneration is.

During combustion particulate matter which comprises of many different elements is produced and mostly contained within the filter rather than just exit via the exhaust. This will be the case when the engine temperature and speeds are lower such as local town driving.

When the exhaust temperature rises the DPF will go into a Passive regeneration state. This increased temperature will break up some of the particulate matter into smaller pieces which can then pass through the filter and out the exhaust.

If necessary the engine ECM will initiate an Active regeneration. Some cars have an additive to aid this, and others have an after injection phase where extra fuel is injected which burns in the exhaust to raise its temperature to break down the PM.

If both of those fail and the DPF becomes too blocked then the dealer can use diagnostic equipment to carry out a forced regeneration. And as a last resort the DPF may have to be removed and professionally cleaned or replaced.

So I wouldn't worry too much about it. Just make sure you use your car in a way where it will regenerate, and avoid continuous short local trips.