Hello friends in this modern era many of them are unfamiliar with the types of e-commerce website and their uses so today I am going to explain the different types of eCommerce business models and their uses 

1.) B2B (business to business type of e-commerce business model ) 

in this type of business model, big companies will sell their products in huge quantity to  other companies with the help of e-commerce websites ex: Alibaba

2.) B2C (business to consumers ) 

in this type of eCommerce model companies will sell their products in online to their customers as per the needs of customers .in this model a user will directly get his needed product with the help of mediators .example for B2C are: Amazon, Flipkart, snap deal

3.) C2C (consumer to consumer ) 

in this type of eCommerce model a customer who is in need of a product will directly get his needed product from another person who is already using that product.

here the person who is using a product will sell that product to others . Ex: olx, quicker, BuyerViu 

in olx we will get all the products which have been already used by others .

in my point of view C2C is not safer .many fraudes may take place .so it is better to stay alert .

4.) C2B ( consumer to business )

in these type of e-commerce model a business man will get his/her product directly from the consumer ex : freelancing 

in freelancing if a business model needs some code or anything as per his needs he will directly get that material needed for him by paying some amount for the consumers work .

5.) B2A (business to administration )

i. This type of model some government or private companies directly takes the needed product from the business persons and pay money for their work .

some business companies provide apps and websites for the government sites for their needs .now government pays some money for it 

6.) C2A (consumer to administration )

sometimes the government announces their needed things and pays money for the consumers who will finish it and submit to their authorities.

in this model, the government will directly buy products from consumers.