This is the 15103rd most frequent Russian word.
покупательной
Relating to purchasing or buying power.
The word "покупательная" is used as an adjective describing "способность" (ability), referring to the capacity to buy goods.
Покупательная способность населения выросла в этом году.
The purchasing power of the population has increased this year.
Here, "покупательная" modifies "активность" (activity), indicating actions related to buying in the market.
Мы оцениваем покупательную активность на рынке.
We are evaluating purchasing activity in the market.
In this sentence, "покупательная" is used as an adjective for "политика" (policy), pertaining to strategies related to purchasing processes.