In Pokémon battle, holding is a very important move, especially in doubles, if you can successfully guess that the opponent may want to set fire or attack the object of this round, then a hold may reverse the form of the battle, doubles cooperation, reasonable points to hold to protect their own safety this round and deceive the opponent's moves are particularly useful, and in addition to holding, there is another move that is almost the same as the holding effect, that is, to see through, then it is reasonable to say that there is no difference between holding and seeing through. However, many players choose to see through when Pokémon can learn to see through, why is this?
PS: This article is purely personal opinion, if there is any error, please correct (the pictures shown in this article are Pokémon that can learn the skills to see through).
Keeping most Pokémon can be learned, but seeing through it is not:

The official actually knows the importance of keeping in the battle, so keep this move since the second generation every generation has appeared as a move learner move, and in addition to a small number of Pokémon, almost all Pokémon can be learned, therefore, a Pokémon belt without holding in most of the time the consideration is whether there is a need to carry, and in the doubles is not every elf hand to hold, but in the end, the doubles are still flooded in the doubles, so the doubles are attacking or interfering with each other. Unless you know that the other party does not have the possibility of carrying a guard skill (such as props are vests, scarves, etc.), you must leave a hand that the other party may be prepared to hold.
And see through as a move with the same effect as the hold, although there are many Pokémon that can be learned after upgrading, but because the second generation after see through is no longer present as a move learner, so the Pokémon that can be learned are still limited, the use of seeing through is no different from holding, and the reason why many players feel that it is better to carry through in the case of seeing through is that if a Pokémon carries a hold, it is likely to be targeted and lead to the use of the hold.
Sealed Guard:
Because of the frequent appearance of the guard in the doubles, so there is a part of the tactics for holding, the core of these tactics is to seal this move, the effect of sealing this move is to make themselves into the sealed state, during the period of their own sealing state, any Pokémon of the opponent can not use the same move as any of the moves they have learned; because most pokémon can be learned, so it is particularly easy to seal and hold pokémon that can learn to seal, At this time, if you carry through it, you can avoid such a problem to a large extent, and because of this, most people tend to learn to see through without learning to hold through Pokémon when they have it.
It can be seen that even two moves with the same effect will lead to slight differences due to differences in generality.