I would also add speed in the list. If your website takes any longer than few seconds to load the customers will move on very quickly.

I have a web designing company in Hyderabad and I understand the requirement for any business website very carefully and I agree that all your points are valid and according to me for e-commerce website the most important this is to highlight your products with a much easier navigation and a easy to use payment method with a beautiful design, if you have covered these, then obviously your e-commerce will be a better for online shopping.

That it be easy for the client to customize should be on the list.

SEO-Friendly = HTML eCommerce Sites instead of dynamic

That it is easy to integrate with Quickbooks and other bookkeeping software is another.

Here are few things which i personally would like to mention

Keep the search bar easy visibility

Today customers look for social media integrations, have that

Make use of quality photo to attract

Visible shopping cart icon

Site must be easy to navigate

Make it user friendly as well as search engine friendly

Always keep updating your sites thats really good from seo point of view

Having zoom in features are good, which is common now

you can provide news letters

A space for testimonial

You can check out Uni-eMerchant Demo to an idea

Multi Vendor Shopping Cart Software | Uni-eMerchant

Click demo button to see more.

As a common man i prefer site to be attractive and easy navigable with demo and feedbacks.

I'm an expert on design. I think the home page is very important to draw people in. The social media buttons should not be large. You don't really want people to leave your website and go to Twitter. You want them to stay here and buy something. Showcase a couple of your goods in the center of the page in a slider (rotating photos). Tease visitors and make them want to see come in and see more of what you have to offer.

For designing an e-commerce website the most important thing is easy navigation and order completion in less steps without any hassle. I would say a categorized ecommerce website appeal more to an individual than anything else.

Source: Website design company Hyderabad

The most important thing in design responsive style however design should open every size screen and devices that's major aspect as i understand .

source , how to make design friendly and seo click here seo india

There are a few things that can go into an ecommerce site that haven't yet been mentioned and a lot it depends on what you're selling.

You'll want to use a system that will store the proper metadata about your product. This is typically formatted at microdata. This helps the search engines learn more about your product in a format that they want, therefore resulting in better rankings and more accurate results.

About microdata - Webmaster Tools Help

You'll want reviews as well. I like using WooCommerce, the WordPress plugin, for most eCommerce sites because it formats the reviews with microdata as well, so that you'll see the stars of the reviews in the Google search results Rich-snippets - Reviews - Webmaster Tools Help

If it's a digital product with multiple plan options, you'll want to have a pricing table.

For example: Power BI Pricing Table

For more of a retail sales like clothing or computer, you'll want to think about how the filtering process happens. For example, something like on NewEgg.com where you can filter your options by price, screen size, etc.

Magento seems to be the most capable system to do this out-of-box from my experience.

For products that have variations in size or color, it's usually best to keep them as one product and have them choose the options as they add the product to the cart.

You'll also want to think about how you're handling inventory. Most systems will handle manual entry of your inventory, but some more complex ones can tie into your POS system to sync up with what's in your store.

In addition to this stuff, it's important to make sure that you're processing payments in a PCI Compliant way. This mostly involves making sure that you are using a SSL certificate, forcing HTTPS at the checkout process and not storing card information where you have access to it. Your payment gateway will take care of the rest usually.

Hope this helps.

Paul Stonier

Paul Stonier Design

Great suggestions everyone, keep them coming.

Ilona