“PPG back on top” typically refers to the return of PPG Industries, a global supplier of paints, coatings, and specialty materials, to a leading position in the market. This could relate to various aspects such as financial performance, market share, or product innovation.
If this phrase is being used in a specific context, such as a recent news article or financial report, it may indicate that PPG has regained leadership in terms of sales, profitability, or competitive advantage after facing challenges or competition.
To provide a more precise interpretation, additional context would be helpful, such as the industry situation, market trends, or specific events that might have contributed to this resurgence.