I used a tool to get prospect information from LinkedIn. What would be the next step to approach them and offer my services?
First, make sure you know who your product and or service is for(customer persona).
Next, segment the data according to your prospect information.
After, Create exciting AD's to capture their attention (you can do a small ad test and split test the ad to make sure it's useful.)
Have the add lead to more information and then into a buy!
Capture abandon services, then target with a different ad.
Remember, you always want to provide them value in your service, so make it about their needs not what you think they need.(this requires you understanding your customer)
If all this is too much, you can always create a simple AD dependent on what you want to accomplish and push that.
ALWAYS focus on their needs. Use a lot of "you" centered language.
Depending on your line of business, offering a free gift such as a webinar, an eBook, a complimentary 15-minute consultation (add a limiter such as for five people — this creates urgency and doesn't make you look desperate for business), etc. works wonders.
I have completed in-person training with some of the seven-figure email marketers that provide true value while making money. I would be happy to get on a call with you to pinpoint your needs.