WeChat mobile site / WeChat mini-site
WeChat mobile/mini sites are specifically designed and optimized for the device & context of your (WeChat) user. These bite-sized, highly customized sites create a better user experience than a standard WeChat official account, are cheaper than creating a full website and are great for campaigns.
WeChat mini-programs are applications that function within the WeChat app with full access to all that the WeChat ecosystem has to offer. They are very similar to a native app, but are cheaper to develop, as there is no need to develop iOS and Android specific versions, and are thus, also cheaper to maintain. WeChat mini-programs are very light (max. 10MB, media files excluded), and because they are hosted on Tencent’s server, they have great loading speed.