How to use Opening Explorer effectively?

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SteelSerpent

I play e4 in every game because I don't know any openings. I want to learn some new openings for white, and how to combat certain openings as black. I don't really know how to use the opening explorer. How do you use it, and are there any openings you recommend for a 1200-1300 player?

Playful_Tiger

If you want to use opening explorer as you play, do some correspondence games. That's how I improve my opening knowledge.