This is the 2501st most frequent Russian word.
продаж
"Продаж" means "sales" or "selling" in English.
Here, "продаж" is in the genitive plural form, indicating the object of increase and specifically referring to sales as a concept.
Увеличение продаж — основная цель компании в этом году.
Increasing sales is the main goal of the company this year.
In this case, "продаж" modifies "отчёт" to indicate that the report is about sales, also in the genitive plural form.
Отчёт о продажах за прошлый месяц оказался очень положительным.
The sales report for last month turned out to be very positive.
"Продаж" is part of the phrase "менеджер по продажам," meaning "sales manager," where it refers to the field or domain of sales.