Media planning concepts involve understanding regulations, media consumption, category spending, and competitors' communications efforts. Media planners must balance reach, frequency, budget, and effectiveness. Frequency refers to how often a target audience is exposed to an ad and should vary based on message, competition, objective, audience, and media. Reach represents the percentage of a target audience exposed, while gross reach combines exposures across media. Gross rating points reflect reach and frequency. Effective media planning requires balancing frequency, reach, and budget to maximize advertising impact.