E-commerce
E-commerce is when businesses and consumers buy and sell products online or perform business transaction online. This includes big companies selling their products to people or consumers online on sites such as Amazon, or EBay.
Amazon
Amazon was founded on July 5, 1994. Amazon is one of the world largest online sellers. They sell  mostly everything and their products are very cheap. Amazon started their online business from books and then they developed their way to selling other materials such as kitchen stuff, jewellery, car and motorbike tools, sports and many more.
Scopes and limitations of using Amazon
Scopes
you don't have to go to shop to buy.
cheaper than high street shops.
you can shop anytime 24/7 and 7 days a week.
Limitations
You might want something on a specific date but it may not get delivered.
Risky credit card or visa card purchase, in case of  a fraudulent person gets hold of your credit card or account number, you may run the risk of being duped and cheated monetarily.
you have to pay for delivery (postage fee).
My personal Experience
I use amazon quite often mostly buying books for school. my family use amazon as well and i think it is a great way to do shopping, there a lot of benefits such as it save your time and it is cheaper then shopping in high streets.
EBay
EBay was founded on September 3, 1995. Ebay is the largest online auction site, it is used by many people and business. users simply use it to sell unwanted stuff. EBay sells everything that can come on one's mind.it is also very cheap and have a secure payment method (Paypal).
Scopes and Limitations of using EBay
Scopes
it is way more cheaper than high street shops.
it is easy for people who don't travel so they can just easily buy stuff.
There are more choices available on EBay.
Limitations
The goods could be damaged.
 So for instance if you buy clothes you can't try it on, it could not fit you when delivered.
You can only base your opinion on pictures and description, but when you receive the item it will be completely different of what you expected it to be.
My Personal Experience
Personally I have not use EBay, but I have heard from my friends and people that it is a good way of selling your unwanted stuff. it saves your time and money. the good thing about using eBay is that it is safe and secure, because of the PayPal.
Other E-commerce
there are other  online business that sell online for instance Tesco, Sainsbury and many other but the difference between them is that they have shops, so this makes it easy for customer to order something online and then they can collect it from the store.
Security
there are a lot of companies that use PayPal to make sure that no fraud happen and that customer card detailed is save and secured.
PayPal
PayPal is completely secured and is complete isolated, which mean that if someone shops online on EBay and buy something from another person they will be safe and secure so there card detailed won't go to the consumer and will only stay with PayPal.
Some of the Scopes and Limitation of online business.
Scopes
you can reach more people and you can get more customers.
you don't have to pay for store or hire one.
The biggest advantage would be that you don't have to hire workers and that you save a lot of money and you earn more profit.
limitation
They make less money per item.
Bad feedback can spread quickly and then your company won't be making big profit.
Fraud is very popular online and that could happen to someone business.
 Not many business use PayPal such as Amazon so that could be a problem and you could lose customer because of this.