There are different types of dog collars available in the market depending upon the nature and type of your dog together with its normal behaviour. If you are looking for basic collars that are going to simply allow you to handle your dog and give them appropriate instructions then normal collars would be good enough for your needs.
If however, you are dealing with stubborn dogs or new dogs who have a long way to go before they can be fully trained then you will want chain collars. So chain dog collars are designed for use when training your dogs especially bigger ones who tend to resist instructions and try to be disobedient at times.
Identify your exact needs and then go for a chain collar that is appropriate for your dog type and size. The reason dog size is mentioned here is because chain dog collars are simply not recommended for smaller dogs or for puppies as they can be detrimental to their health and could eventually go on costing them their life.
Only go for the chain collars when you believe there is an absolute need for you to go for them. Otherwise, you will be good enough going for alternative dog collar types that are readily available in the market. There is also no harm in having all types of dog collars available at your disposal so anytime you feel like you need to use an appropriate collar type you can do so right away.