Advertising spending depends on business size, goals, and growth stage today. Many digital marketing guides suggest a small share of revenue, often between five and ten percent. New businesses may spend more at first to get noticed online early. Older businesses with steady traffic may spend less and focus on keeping customers sales. The important thing is tracking results, not copying numbers from others carefully. Spending should increase only when ads bring clear returns over time. What level of spending sounds reasonable for long term growth online?