The phrase "different sectors" refers to distinct areas or fields of a larger industry or society. It means that there are multiple specific parts or categories within a particular area that have their own characteristics, operations, and purposes.
It is an extraordinarily committed group of organisations and individuals, across a vast array of different sectors of the community. (humanrights.gov.au)
Firstly, companies in different sectors of the economy are valued differently. (wisestockbuyer.com)
I have selected these stocks from different sectors in order to diversify the portfolio. (tradebrains.in)