An objection is not an interruption, and it is not a complaint. It is a formal act with a legal purpose, and if you do not perform it correctly, you lose the right to complain about the ruling later — no matter how wrong the ruling was.
Texas Rule of Evidence 103 governs the whole ritual. To keep a claim of error alive, a party who wants to challenge evidence that came in must make a timely objection or motion to strike, and must state the specific ground, unless the ground is already apparent from the context. Two requirements, and each one is a place lawyers lose cases.
Timely means now. You object when the question is asked or the exhibit is offered, before the answer lands in front of the jury. Wait until the damage is done, and the objection is late; late is treated the same as never, and the complaint is gone for good.
Specific means you name the reason. Hearsay. Leading. Relevance. Foundation. A general “I object” preserves nothing, because an appellate court cannot review a ruling on a ground the trial judge was never given a chance to consider. You have to hand the judge the exact rule you are standing on, out loud, on the record.
There is a mirror image for the other direction. When the judge keeps your evidence out, objecting is not enough — the record has no idea what the jury never got to hear. So you make an offer of proof: you tell the court the substance of the excluded evidence, outside the jury’s presence, so a higher court can later decide whether shutting it out actually mattered.
One mercy is built into the rule. Once the court makes a definitive ruling on the record, admitting or excluding the evidence, you need not renew the objection every time the subject comes up again to keep your error preserved. Rule once, clearly, and you are protected the rest of the trial.
So the word to carry is objection, and the truth behind it is that trials are built for the record. The objection is not really for the moment; it is for the appeal that may never come. Make it timely, make it specific, and when your own evidence is turned away, make your offer of proof. Silence waives all of it.
See Texas Rule of Evidence 103: to preserve a claim of error a party must make a timely objection or motion to strike stating the specific ground unless it was apparent from the context, or, for excluded evidence, inform the court of its substance by an offer of proof; once the court definitively rules on the record, a party need not renew the objection to preserve the claim. This is general information, not legal advice.