Add marketing topic

[brzvsk]

Please confirm this pull request meets the following requirements:

• I followed the contributing guidelines: https://github.com/github/explore/blob/main/CONTRIBUTING.md.
• This change is not self-promotion.

Which change are you proposing?

• Curating a new topic or collection

Curating a new topic or collection

• I've formatted my changes as a new folder directory, named for the topic or collection as it appears in the URL on GitHub (e.g. https://github.com/topics/[NAME] or https://github.com/collections/[NAME])
• My folder contains a *.png image (if applicable) and index.md
• All required fields in my index.md conform to the Style Guide and API docs: https://github.com/github/explore/tree/main/docs

Why this topic should be curated

Marketing is fundamentally about connecting products with people who can benefit from them. This topic aims to encourage open source alternatives to the expensive SaaS marketing tools that currently dominate the landscape.

Community Evidence:

• Over 1,800 repositories already use the marketing topic on GitHub: https://github.com/search?q=topic%3Amarketing&type=repositories
• Strong cross-language adoption spanning JavaScript, Python, Ruby, PHP, and more
• Growing interest in open source solutions for email marketing, CRM, analytics, attribution tracking, and marketing automation

Value Proposition:

• Promotes transparency, customization, and cost-effectiveness over vendor lock-in
• Addresses the need for accessible marketing technologies
• Encourages collaborative development of privacy-focused marketing tools
• Supports both developers building marketing tools and marketers seeking open source alternatives

Topic Coverage:
The topic includes comprehensive aliases (digital-marketing, growth, martech, gtm, gotomarket, go-to-market) to capture the full spectrum of marketing-related repositories and ensure discoverability.

This curation will help surface valuable open source marketing projects and encourage more developers to contribute to this space.

[ozh]

@jmeridth @brzvsk why is https://github.com/topics/marketing still showing "Curate this topic" ? What am I missing here

[brzvsk]

@ozh not sure, but had the same question!