In the context of online games, a micro-transaction is the exchange of real world money for some in-game good or service. Most often these are small purchases in the range of $1 to $5.
Some game designers use micro-transactions as a way for players to further customize and personalize their characters, leaving out the purchase of in-game items that may affect a players stats and game balance.
Micro-transactions are popular among free games because they provide the developer with a source of revenue, while allowing players to play through much (or all) of the game for free. One benefit of this model is that it can lead to a larger player base than would be possible with a standard pay to play model.
Generally, each team has one jungler, which means that there will be one lane of two, and two lanes of one. Since the middle lane will always be a solo lane, this means that top and bottom will have varying numbers of champions, depending on the lane.
Top is usually considered a solo lane because the bottom lane is closer to Dragon, an important mid-game objective. Dragon is hard to solo for most non-junglers, and by keeping 2 champions in the bottom lane, it becomes quite viable to 3-man Dragon after a successful gank (or simply a double-kill). While top lane is closer to Baron Nashor, it takes quite a bit more effort to kill him - more than 3 champions in the early game can probably afford to put out. By the time Baron becomes available, the game is usually nearing the end of the laning phase, after which the difference between top and bottom lane is moot (because all 5 champions are roaming).
With a top solo lane, the champion has a leveling advantage and the potential to farm more minions (simply because there is no allied champion to compete with). Additionally, one must consider that if the other team does not have a jungler, they need to be able to successfully last 2 vs. 1. Most often, this means champions with good sustainability are better suited to the lane, such as Cho'goth, Mordekaiser, Vladimir, or Nasus.
Conversely, there are some champions who do not do well in a solo lane - these tend to be support champions like Soraka, Sona, or Janna who perform much better with a partner to buff/shield/heal. These champions usually go to the bottom lane to ensure that they are in a 2 vs. 2 situation.
In instances where there is no jungler on either team, both top and bottom will have an even number of champions. In this case you may be asked to "switch lanes" not because one lane is "better suited" than the other, but because switching lanes means changing which enemy champions you're fighting (and presumably, have been dying to).
Best Answer
For better understanding:
Now to the question... There is no difference. They are the same.
SS = miSSing Or Switching Sides Mia = Miss in Action
Both are meaning to call when your opponent is not in your line of sight. (Recal, brush, hide (eve, twitch...), etc.