This means the work we do for your attorney in preperation for the case is protected under the doctrine "attorney Work product".
In other words, the attorney work product doctrine acts as a safe; it protects a lawyer's most valuable tool: their ability to prepare for trial unencumbered from the stress of opposing counsel discovering their trial strategy. Since the trial process can accurately be described as adversarial, it is of key importance to each lawyer to protect his thoughts, opinions, mental impressions, theories, and strategy from opposing counsel.