Digital marketing refers to the use of digital channels, such as websites, social media, search engines, email, and mobile apps, to promote and advertise products or services.

Digital marketing is crucial because it allows businesses to reach a larger audience at a lower cost compared to traditional marketing methods.

• Search Engine Optimization (SEO): Optimizing a website to rank higher on search engines.
• Pay-Per-Click (PPC) Advertising: Running paid ads that charge you only when someone clicks on them (e.g., Google Ads).
• Social Media Marketing: Promoting your business on social platforms like Facebook, Instagram, LinkedIn, and Twitter.
• Email Marketing: Sending targeted messages to customers and prospects via email.

Results vary depending on the strategy used. For example:

• SEO: Typically, it takes 3-6 months to see significant results from SEO efforts as search engines index and rank your content.
• PPC Advertising: Results can be immediate once your ads are live, though optimizing ad performance can take a few weeks.
• Social Media Marketing: Results can be seen in a few weeks, but building a strong social media presence takes time and consistent engagement.

The cost of digital marketing can vary widely depending on the scope of the campaign, the channels used, and the level of competition in your industry.

SEO (Search Engine Optimization) is the practice of optimizing your website and content so that search engines like Google can rank your site higher in search results.

To get started, you need a clear digital marketing plan. First, define your objectives (increase sales, build brand awareness, etc.), identify your target audience, and choose the right digital marketing channels. 

While a website is not strictly necessary for every digital marketing strategy, it is highly recommended as it serves as the central hub for all your digital efforts.