The Saints have the added responsibility of Europa League this season and will have to play every three to four days for the better part of this year.
Puel made seven changes to his starting eleven in the Europa League game against Sparta Prague on Thursday night, but the Saints still managed to defeat the Czech side 3-0 thanks to a brace from Charlie Austin and a late goal from Jay Rodriguez.
"It's very interesting, because we changed the team a little bit for the start of this game, and I am happy for all the squad, because they can see many good players," he told Southampton's official YouTube channel.
"It was, I think, important to improve and to build for the future. With a game every three days, it will be very important.
"It's important to give chances to all the players. We have young, international players and it is interesting to see them in these conditions and they produced a very good game tonight, and this shows we can travel for the future.
"But, for now, it is important to stay concentrated on the next game against Swansea, which will be very difficult, because the players must play another game after just two days off following this game."
The Saints will now prepare for the home Premier League clash with Swansea City on Sunday.