Parcel lockers are a very interesting concept. It's generally something quite straightforward - something that stores items for your at a location (and you get an email / SMS notification + can open it via code, or app).
The idea probably was invented in many places, but I think Germany had them first. They are incredibly popular in Poland, because they are very reliable. Towns are full of them and in last years, basically even the smaller villages get them.
This all happens at the expense of couriers (who are more expensive) and 'regular' post (who is run by the state and sadly was quite unreliable. In fact it was so unreliable, that they bought a private company just to handle the packages. The bought company called POCZTEX is now very reliable, but 'regular' post used to send mail lost a ton of market share).
I wonder if Amazon copied the idea from Allegro, or possibly German post, or perhaps Korea (who also has them I think?).
Now Poland is a place of an interesting battle, where Inpost parcel lockers have most of the market share and locations, but multiple other service providers (Polish post, Allegro, Amazon, Aliexpress) try to build their own networks.
There are of course also multiple courier companies.
Normal post office is becoming more and more unprofitable - despite good locations. They deal with the low margin letters. The parcel market has much better margins (even despite being cutthroat).
