Socialisation is creating a positive experience for your puppy whilst preparing it for life in the outside world. Between 0-16 weeks is the key time to socialise a puppy to new environments and experiences. Puppy have a critical Socialisation window which closes around 16 weeks. This is not to say that after 16 weeks you can’t socialise a puppy – you can but the earlier the better in most cases. The PDF below can be downloaded and goes into more detail on what to socialise and how to do it to ensure its a positive experience for your puppy.
Pictured below are some of Ralph's socialisation experiences