I've already searched to no avail, so I'll ask a noob question. Is there somewhere a chart showing what all the symbols, (mainly the red and blue swords and shields) and what they mean, or do we have to guess as we go along? I've been playing this game for 8 months now , and I still dont have a clue. Thanks in advance.......
This is "a little bit of everything" icon. You want buildings with this one.

if this is, say 50% in the buildings reward section, then EACH of the items (red sword, red shield, blue sword, blue shield ...) EACH GET 50% boost.
Inno has quickly started adding venue specific boost icons. SO this icon,
without a venue showing, is for ALL venues: GbG, GE, PvP, PvP Arena, CMAP fighting, Ally (Heroic Taverne), etc.
So it helps you basically everywhere.
No specific venue boost icons are what you covet. They work on everything (for the most part).
Sorry for the crappy image resolution, but I think you get enough of the image design to know it's helpful on all 4 basic boost metrics.
Now this icon, for example, is RED SHIELD for ONLY GBG fighting

, so you get the boost, but -
it ONLY works in GbG. The
green banner attached in the lower right hand corner, is the GbG emblem banner for war boosts: