Deal with outliers

I'm studying a dataset with a wide range of values (for example a varibale assumes values from 0 to 15mln). Obviously calculating principle descriptive statistics and plotting some graphs (for example boxplot and histograms) I've some problems. My question is: how to deal with these values? I've to delete them ? The dataset I'm talking about is: https://www.kaggle.com/free4ever1/instagram-fake-spammer-genuine-accounts#test.csv