Digital marketing, also called online marketing, is the promotion of brands to connect with potential customers using the Internet and other formsforms of digital communication. This includes not only email, social media, and web-based advertising, but also text and multimedia messages as a marketing channel. Essentially, if a marketing campaign involves digital communication, it’s digital marketing.
In order to establish and maintain a successful company in the digital age, managers are digitally transforming their organizations to include such tools as disruptive technologies and digital data to improve performance and efficiency. https://www.igi-global.com/book/business-transformations-era-digitalization/205238
Content marketing is a marketing strategy used to attract, engage, and retain an audience by creating and sharing relevant articles, videos, podcasts, and other media. This approach establishes expertise, promotes brand awareness, and keeps your business top of mind when it’s time for the audience to buy what you sell.

51 Digital Marketing Tools Trusted by the Experts, (Categorized).
According to https://blog.useproof.com/digital-marketing-tools , these are the best digital marketing tools:
* Digital Marketing Analytics Tools.
1. Mixpanel
2. Hotjar
* Digital Marketing Tools for Conversion, Marketing Automation, & Personalization.
3. HubSpot Forms
4. Proof
5. PersistIQ
6. Marketo
7. ActiveCampaign
8. Mailerlite
9. Unless
10. Zoho SalesIQ
11. MailChimp
12. Leadfeeder
13. ContactOut
14. Pardot
15. Nickelled
16. Albacross
* Digital Marketing Tools for Design, Social Media, and Video.
17. Canva
18. Tube Buddy
19. Upfluence
20. Buffer
21. Iconosquare
22. Hootsuite
* Google Tools for Digital Marketing.
23. Google Search Console & 24. Google Analytics
25. Google Forms
26. Google Alerts and 27. Google Trends
28. Google Data Studio
* Digital Marketing Tools for Keyword Research, SEO, and SEM.
29. Moz Pro
30. Moz Open Site Explorer
31. Ahrefs
32. SEMRush
33. Unbounce
34. Screaming Frog
35. SE Ranking
36. Keywords Everywhere
37. Mangools
38. Majestic
39. Nightwatch
40. AnswerThePublic.com
* Digital Marketing Tools for Productivity.
41. Trello
42. Ontraport
43. Builtwith
44. Yesware
45. Slack
46. Wordable
47. Boomerang for Gmail
48. Hunter.io
49. CallRail
50. Airtable
51. Wiseteam
These are the comprehensive list of digital marketing tools for 2019 – straight from the mouth of industry experts. Digital marketing is continuously evolving, opening up new opportunities every day. As technology is introducing new communication channels and tools, the cost to experiment new methods is getting lower. As a business, whether B2B or B2C, if something doesn’t work for you, move on and try something else. But make sure you understand the significance of innovation.