I develop online stores with WooCommerce, which is a WordPress plugin. It is an open source software. WooCommerce is the world’s most popular e-commerce software platform. It has more than 2 million active online stores and a 28% market share.
The website and online store fully integrated, because WooCommerce is an extension of WordPress. Content and product updates are done through same admin panel.
There are many payment methods for WooCommerce.
WooCommerce is easily customizable. For example, it is possible to include products, checkout, etc. on any WordPress content page using the short code. Localization is accomplished by setting currency, language, and units of measure.
WooCommerce is well documented and has over 400 official extensions. Popular extensions are e.g. Google Ads and MailChimp,