Point 1: Yes, Adobe launch comes free with Analytics, Launch is next generation tag management, works way better than DTM.Point 2: If you have the latest App measurement, then its natively build into the base code. Refer Util.getQueryParam  .For legacy code refer getQueryParam .

1. Yes, util.getQueryParam is the latest you can refer Adobe Analytics Help | getQueryParam versus Util.getQueryParam 2.DTM is a free (when you buy adobe analytics) tag management tool where you can manage all the page level codes in a single place. It can place any tags Like GA, FB Pixel on the pag...

For Point 1:To Understand segment container, go to pages report and try a segment like this Page equals "Page A"(Any page in your report).When you put hit in the container it will only show data for Page A (ie it works based on pageview)When you put visitors container it will show Page A plus all ot...