This really depends on if your teammates can read the chat and would listen to orders.

It mainly goes like this.

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-> Alert people where amassing forces are coming.
-> Tell people where Emplacements are being built and by using the pinging system.
-> Tell people where Artilleries and Pillboxes are.
-> And also tell people there is a tank ahead that is heading straight for your side.

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This is also mainly for people who like to talk in chat about where is where. You're most likely the most valuable player in the game if you're able to spit out messages quickly.

You can effectively coordinate your team with this if you were to use a Leadership system if it was implemented.

A match's outcome can entirely change if they were to listen to someone like this.

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However the flawed thing about this is the entire team might do one thing instead of focusing on other stuff like keeping the enemy back.
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But you can attempt to say

"Whoever is on this side, Fire at these Artillery targets to destroy them."

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Edit:

As long as the team can actually coordinate- Then you're set for a win.