That’s an action. What does “support” entail?
My action is to put time and money behind the strongest Conservatives in as many primaries as I possibly can.
“What does “support” entail?”
You should not expect some grandiose, swelling music that accompanies grand actions and sweeps up everything in its path. That does not apply to most of us. You support by educating yourself, talking to your friends, sending emails, etc., and as you said, voting. In other words, you do what demos instruct their minions to do to pursue their objectives. They advise for everyone to persuade at least one person.