digital marketing is a vast field, there are different profiles are available in this field like
e mail marketing, social media marketing, adwords, seo, orm, web analytics, ecommerce
there are all separate tools for each of these profiles
email marketing, tool mailchimp
social media marketing, tool pagemodo, woobox, tweetdeck
adwords, tool adword google ppc online advertising
seo, tool, search console and for keyword research ubersuggest, kwfinder
orm tool google alert, namechk, knowem
web analytics tool google analytics solution marketing analysis and measurement
ecommerce tool google merchant, kartrocket, fedex