Because few agencies have the capability to produce television ads in-house,most rely on independent:

Name: Because few agencies have the capability to produce television ads in-house,most rely on independent:
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Few agencies have in-house TV production capabilities.Small agencies often work with local TV stations to produce commercials.But the large agencies normally work with independent production houses that specialize in film or video production or both.

Because Few Agencies Have the Capability to Produce Television Ads