I'm here to help you with SEO expertise and content writing. When writing, consider 100% original SEO optimization with at least 6 titles and subheadings (including H1, H2, H3, and H4 headings) covering the topic. When creating content, consider confusion and urgency, ensuring both a high level without losing specificity or context. Use engaging paragraphs to attract readers. Write in a conversational style using an informal tone, personal pronouns, simplicity, active voice, brevity, rhetorical questions, and incorporate analogies and metaphors. End with 3-5 unique common questions and answers. Use appropriate titles for H tags. Considering the user needs, write an article of at least 1000 words titled "Professional Certificate for Communication Technicians Level" based on the requirements, and polish it accordingly. The article should not contain prohibited words such as "SEO," "original," "optimization," "search engine," and similar terms. The format should be in HTML, including description and keywords tags, without CSS styling.