Buying companies whose revenue and earnings are expanding quickly, accepting a high valuation today for a larger business later. It is the mirror of value investing: the multiple is high precisely because the market already expects growth, so the risk is not that the company does badly but that it merely does well. Each PSEye stock page shows year-over-year change on revenue and net income beside the annual statements, which is where the claim gets checked.
See also
See every term in the full PSE investing glossary.