Lately I decided to explore the MEMPOOL.i came across some relatively small transactions which occupied  large block spaces therefore making the fees big.I also saw a couple of blocks on the meme pool some were large amounts of Bitcoin transactions but had very low transaction fees which is accountable to the small block space they occupied.I am aware of how to use the time factor to my favour. how is it possible to make your transactions occupy the smallest block space possible so as to reduce your transaction fees. Will using the layer 2 reduce block space?