What does mean of the SSL certificate?

A security certificate is a shortcut to the Secure Socket Layer ... Secure Connection Layer

The most important feature of this certificate on your store is  encryption of data between the server and the browser can not be any intruder or hacker to get the data sent from the visitor to the server and vice versa because this data is encrypted and the key code at the server only ....

Why does the owner store need SSL certificate for their online store?

SSL certificates have become an important part of the Internet world. Not only because it encrypts data between the visitor and the server, but because it gives confirmation of the site's identity to the visitor and gain the confidence of your customers as when security level is higher in the site the more trusted customers and increased the ranking of your site on search engines. Attention should be paid to the protection policy in terms of It deals with transactions inside the site, and secure the customer's private data whether from registration or through transactions

SSL certificates are divided into three types in terms of type and strength of encryption (security), which we will explain briefly to you:

1. Domain Validated Certificate

These certificates are suitable for sites that are more like personal sites and blogs and for any other site that does not exchange private or confidential data or sites that do not require an advanced encryption basis. It only provides content. This certificate tells you that the domain of the site is registered , known and is true not else , where blogging sites do not need any encryption as it a content site only, this kind of certification you can get for free

2. Organization Validated Certificate

It is the average type of certificate, where the verified from registration site and its scope and that it is a real site to ensure the authentication of certificate safety, this type is valid for the most general sites and electronic stores , which are the purchase and sale electronic which certificate ensure that the site is real and that the information provided by this site is encrypted and Safe, 

3. Extended Validation Certificate

It is the strongest, best and most reliable type of the three types. It is not granted to any site or company until after checking and matching the site work system (the company) follows the highest and best global practices in all its activities to verify website identity and guarantee it to all visitors. This certificate is expensive and is not required by any site. Only the most world's sites need it , which want to prove their reputation and have hundreds of thousands or millions of sales and purchase, the owners of these sites require a high-level certificate to give credibility to their visitors that these sites are very reliable and safe to buy, The price of this certificate ranges from several hundred dollars to thousands annually.

What is the importance of SSL for leading search engines?

1. There is no doubt that https has become a factor in the search engines according to Google's statements, as Google introduced in its algorithm for the search engine a new factor is the site's security certificate, meaning the site uses a reliable security certificate has a preference in this factor than others, For more information on this topic you can access the following article link
https://webmasters.googleblog.com/2014/08/https-as-ranking-signal.html
From the article that Google began to consider https as one of a factor that take the lead in the results of search engines, Though the impact is less than 1% currently. However, they may decide to increase the importance of https in take the lead at results and encourage all webmasters to convert to the https protocol

2. Google constantly searches for user safety and wants to provide it with maximum security

3. Most of the websites such as Souq.com and AliExpress have converted into https protocol

With regard your online store you need the second type of certificate,

The SSL certificate is available on all packages for free, except for the monthly or annual stander package which costs 35 $

Contact the technical support team to send a request to the development department to be issued to your store within 3 to 5 business days

On the next link you can learn more about the prices of the packages with the applications attached with each package

https://www.expandcart.com/en/%D8%A7%D8%B3%D8%B9%D8%A7%D8%B1-%D8%A7%D9%86%D8%B4%D8%A7% D8% D8% A% D8% D8% D8% D8% D8% D8% D8% D8% D8% D8% D8% D8% D8% D9% 89 /