This is the 13859th most frequent Russian word.
обзорных
"Обзорных" means "overview" or "viewing" (adjective, relating to a review or survey).
The word 'обзорных' is used to describe 'excursions' (экскурсиях), indicating they are overview tours.
Мы участвовали в обзорных экскурсиях по историческим местам города.
We took part in overview excursions to historical places of the city.
Here 'обзорных' modifies 'report' (отчет), specifying it is an overview report.
Ведущий представил обзорных отчет о проделанной работе.
The presenter gave an overview report on the completed work.
In this case, 'обзорных' is used adjectivally to describe 'articles' (статей), showing that these are articles providing an overview.