What insurance defense work actually is
Under most liability policies the carrier agrees to defend as well as to pay, and it assigns counsel to do that. Insurance defense firms are the ones who take those assignments, and the arrangement has a feature people find surprising: the lawyer defends you while the carrier pays the bills and receives reports. Policies typically require prompt notice of a claim and cooperation afterward, and both are conditions rather than suggestions. A reservation of rights letter means the carrier is defending for now while preserving the argument that the policy may not cover the loss. That letter is worth reading line by line rather than filing away.
When questions about counsel arise
Where the insured's interests and the carrier's coverage position pull in different directions, some states allow the insured to select independent counsel at the carrier's expense, and the circumstances that trigger that right differ by state. Exposure above the policy limit changes the conversation again, as does who holds authority to settle and whether your consent is required. Companies that select and manage defense firms have a different set of concerns, centered on reporting, budgets, and panel guidelines. Both sides of that relationship are easier to handle when the policy language has been read closely at the start rather than during a mediation.
What to do when the suit arrives
Tender it to every policy that might conceivably respond, not only the one you assume applies, because general liability, professional, employment practices, and cyber policies can each reach a different part of the same complaint. Send the complaint and all correspondence promptly and keep proof of what you sent. Locate the full policy rather than the declarations page alone. Avoid statements, admissions, or side agreements with the claimant while coverage is being sorted out. Also check whether a contract obligates someone else to defend or indemnify you, since that is often overlooked. Notice requirements and filing deadlines apply and they differ by policy and by state.