The negativity is really uncalled for. You could simply say "I don't understand, and haven't bothered to Google for 5 seconds what some of these confusing terms mean--can someone please clarify?"
This stuff is all geared at advertisers who want better tools for designing ads and landing pages, and publishers who want to create ad supported sites more easily. So they are using industry jargon that people in the space (like myself) will be familiar with. Yes it is "marketing to marketers" (not sure about the lesser remark), but that doesn't make it any less specific.
I'm not sure which specific page you are referencing, but this is all technical advertising jargon that means very specific things.
"Viewability" is a technical term referencing whether an impression is viewed by a user. As advertisers increasingly demand more transparency around ad inventory quality from publishers, viewability is a newer metric that the industry looks at.
Here's a good starting point from the IAB for how they classify it [1].
Determining whether an ad has been in view has some technical challenges which you might be familiar with if you know much about front-end stuff. At a quick glance of your quote, this references improving the way a pages viewability of ads is measured on mobile by removing the need for Flash for sites to signal "hey, this ad impression is viewable (and thus more valuable)!" Flash bad, this good.
Here's some further reading[2] on the technical challenges from a company that handles inventory where these metrics are a factor.
Look, we get it, you don't like marketing. And yeah, my industry can lay it on thick sometimes, but this is about as poor an example of that as it gets.
[1] https://www.iab.com/guidelines/state-of-viewability-transact...
[2] http://productblog.appnexus.com/evolution-of-viewability-mea...