Basic web and SQL for software testing:
Client-server architecture
HTML
CSS
HTTP protocol
SQL

Software testing:
Software development cycle
The essence and purpose of quality control, quality assurance
The process of collecting requirements
Requirements specification
Test strategy, test plan
Software Development Methodologies Waterfall, V-model, Incremental, Spiral
Agile Kanban Methodologies, SCRUM
Test Design and Testing Process
Requirement Traceability Matrix
Priority & severity
JIRA system bug tracking
Bug life cycle
Types / types of testing according to various criteria
Test-design
Acquaintance with Selenium

SEO:
Promotion in social networks (SMM)
Contextual advertising
Email Marketing