I think he's talking about general fleet micro styles that people use.
A very common strategy. Set up large defenses on one of your planets adjacent to one with a large number of ships on alert. Take a large fleet and bring it into said adjacent planet. Quickly withdraw all of your ships to your heavily defended world and watch the fireworks.
This strategy really only works if you have teleporting ships (teleport raiders are preferred).
So, you take a large stack (Preferably full caps) of teleport raiders and put them on a particularly nasty planet. Pause the game, and select attack all the guard posts you can with the teleport raiders. Wait a few seconds, pause the game again and scroll out very, very far across the map, well beyond the gravity well that normally impedes ship movement. Most if not all of the enemy guard ships should be moving towards them. If they aren't, put them closer to the guard ships. Wait until said ships are getting close to your raiders, and then teleport them farther away. The guards should still be following them. At this point, feel free to try to snipe off particularly pesky ships, like guardians (but stay far away from heavy beam and electric guardians, they utterly annihilate teleport raiders), but in general, try to keep your stack of raiders alive. Note that if the planet has sniper ships or ion cannons, this strategy will likely not work at all, as the teleport raiders would go down much too quickly.
Now that you've created this distraction, send in your main fleet to clean up the rest of the defenses while the rest of the ships are far away chasing the teleport raiders. Hopefully you'll be able to destroy most of it without having to directly confront the guard ships. Note that this doesn't always work, though. Slower ships will still be left behind, though they won't be much of a problem for your fleet to deal with, hopefully. I'm not entirely sure how AI ships respond to the gravity well, either, as I don't use this tactic often.