Digital marketing is basically done through as follows:-
Search Engine Optimization (SEO): Ranking the website on the first page because if a person searches for a specific niche, your website should rank first, It is the Organic way which is done through SEO.
Social Media Management (SMM): This is generally creating posts and posting them to every Social Media Platform with a proper call to action, hashtags, and more.
Search Engine Marketing (SEM): It is the paid way which is done through paid campaigns through Google Adwords.
Blogging: Creating blogs regarding the niche will help your customers to interact with what is the website about and also it will give intimation to Google about the niche.
Email Marketing: Email marketing is the act of sending a commercial message, typically to a group of people, using email.
Content Marketing: Content marketing is a form of marketing focused on creating, publishing, and distributing content for a targeted audience online. It is often used by businesses in order to Attract attention, Expand the customer base, Increases online sales, Increases brand awareness, Gives you the Digital Presence.