This is the 16863rd most frequent Russian word.
совершать
To commit, perform, or accomplish.
In this sentence, 'совершать' is used to mean 'to perform' or 'to take part in' an activity, specifically walks in this case.
Он любит совершать долгие прогулки по парку.
He enjoys taking long walks in the park.
Here, 'совершать' is used to indicate the act of making decisions, showing the responsibility or action associated with it.
Не стоит совершать поспешные решения.
One should not make hasty decisions.
In this context, 'совершить' (perfective form of 'совершать') denotes the act of committing a deed or action, often used in legal or formal contexts.