Here are some hard skills that can be beneficial to include on a marketing resume:

Search Engine Optimization HTML/CSS
Pay-Per-Click Advertising Copywriting and Content Creation
Content Management Systems Marketing Automation Tools
Social Media Marketing E-commerce Platforms
Data Analysis and Analytics Conversion Rate Optimization
Email Marketing Digital Advertising Platforms
Customer Relationship Management Affiliate Marketing
Market Research and Consumer Behavior Analysis Brand Management
Graphic Design Public Relations Skills and Media Planning
Video Editing A/B Testing and Experimentation

Highlighting these skills can make your resume more attractive to potential employers in the marketing field.