Digital marketing refers to the practice of promoting products, services, or brands through various forms of electronic media. The key objectives of digital marketing are to increase brand awareness, drive traffic to a website, and ultimately, to generate leads or sales.

Some common types of digital marketing tactics include:

1. Search engine optimization (SEO): Optimizing a website's content and structure to improve its ranking in search engine results pages (SERPs) for relevant keywords.
2. Pay-per-click (PPC) advertising: Running ads on search engines or social media platforms that users can click on to visit a website. Advertisers pay each time their ad is clicked.
3. Content marketing: Creating and distributing valuable, relevant, and consistent content to attract and engage a clearly defined audience, with the goal of driving profitable customer action.
4. Social media marketing: Using social media platforms to promote a product, service, or brand.
5. Email marketing: Sending promotional messages or advertisements to a list of email addresses.
6. Affiliate marketing: Partnering with other companies to promote their products or services and earning a commission on any resulting sales.
7. Influencer marketing: Partnering with individuals who have a significant following on social media to promote a product, service, or brand.

A well-rounded digital marketing strategy should incorporate a combination of these tactics to reach and engage with its target audience.

Best place to start is understanding your target market and audience, and which tactics will be most effective in reaching and engaging them. Setting clear and measurable goals, along with creating consistent and valuable content, can also greatly benefit a beginner in digital marketing.