What is a good volume for day trading?

When it comes to day trading, a question that often arises is what constitutes a 'good' volume. Can you explain what factors should be considered when assessing the ideal trading volume for day traders? Is there a specific threshold or range that is generally considered optimal, or does it depend on individual strategies and market conditions? Additionally, how does trading volume relate to liquidity and price volatility, and how can these factors impact the success of a day trading endeavor?