What is your best solution to use specific niche emails and numbers ?

Hello there people,

I have interesting clients because of the company i worked in. We do a lot of work for them, but i have one interesting part.

I have access to the emails, requests and phone numbers + names and surnames for the specific niches. I attach one list just as example so that you can see how i have it.

Since i am not in marketing / mail business i would like to know all possible ways what can i do with those lists, what would be the best income.

Thank you all.