A digital marketing agency is a company that provides various digital marketing services to businesses. These services can include things like search engine optimization (SEO), pay-per-click (PPC) advertising, social media marketing, content marketing, email marketing, and more. The goal of a digital marketing agency is to help businesses increase their online visibility, attract more website traffic, and ultimately drive more sales or leads.

Some common services offered by digital marketing agencies include:

1. Search engine optimization (SEO): This involves optimizing a website's content and structure to improve its ranking in search engine results pages (SERPs) for specific keywords or phrases.
2. Pay-per-click (PPC) advertising: PPC advertising allows businesses to place ads on search engines and other websites, and only pay when a user clicks on the ad.
3. Social media marketing: This involves creating and sharing content on social media platforms in order to increase brand awareness and engagement.
4. Content marketing: This involves creating valuable and informative content that is designed to attract and engage a specific target audience.
5. Email marketing: This involves sending promotional or informative emails to a list of subscribers in order to increase brand awareness, engagement, and ultimately drive more sales or leads.

A digital marketing agency can also provide analytics and insights to help clients to understand the results of their marketing campaigns and then optimize them. Some agencies also offer more specialized services like mobile app development, affiliate marketing, conversion rate optimization and more.