Meaning of the headline 超流量平台 The 平台 is usually rendered as 'platform', but what is the 超流量?

The total context of the phrase is as follows:

是俄罗斯及市场最新颖的垂直跨境电商零售批发网站。未来平台注册用户数将超过1000万+，日均访问UV超过100万+，PV超过0.5亿+，最大化展现平台流量价值.

So would it be 'a site / a platform / an Internet space (Russian 'ploshchadka') with highest [Internet] traffic'?
Your understanding (highest [Internet] traffic) seems correct, given that it is used on an e-commerce site. 

But I want to point it out that it is not a standard/correct word. Chinese have a lot of freedom in coining new words but not all of them are fine ones. Of most IT-related idioms, 超 is translated from hyper, so we have 超链接(hyperlink), 超文本传输协议(HyperText Transfer Protocol), etc.

Nobody can give an exact meaning of 超流量平台 because it is not a standard IT idiom published by 全国科学技术名词审定委员会（China National Committee for Terms in Sciences and Technologies ）. That's why I said in my previous answer, it is just an ill-devised fancy word.