...can someone explain assigning specialties in each city under certain civics? Like merchant, scientist, etc.
Here are a few things you can try:
- Build wonders and structures that boost your commerce / research / production / culture rating
- There are a number of buttons at the bottom center-left of the screen when you are in city view mode. There you can choose to (off the top of my head here) focus on production, research, growth, commerce, and so on
- Different civics will give you the boosts you want. For instance, choosing the Caste civic allows you to create artists, merchants and scientists; it's not the
"most advanced" labor civic but if you want specialists this civic is preferrable to emancipation.
- Another example of this is the mercantilism civic, which grants you one free specialist per city.
These specializations are most effective if you are committed to a specific game plan and make a beeline to the required techs to reap the rewards from early on; most of these specializations are meaningless towards the endgame, when you should already enjoy a very distinct advantage (e.g. culturally strong, diplomatically strong, scientifically strong, militarily strong) compared to other civs.