As we have seen, there are three main variations, i.e., Advance Variation, Classical Variation, Exchange Variation. All these variations are slightly favoring white if they have prepared well. Apart from this, there are side variations such as the Two Knights variation and Fantasy Variation. If you are a beginner, then I will recommend that you prepare for classical variation. It’s a timeless strategy and will hold you sound until you become a world champion. For rapid and blitz games, I will recommend studying Fantasy Variation and Two Knight Variation. These are the variations which people do not study in-depth, and hence they will spend their time to find good moves.