As of my last knowledge update in September 2021, I can provide you with some SEO techniques that were expected to be relevant and effective in 2023. However, keep in mind that the field of SEO is constantly evolving, and search engine algorithms are regularly updated. To stay current, always follow the latest SEO news and best practices. Here are some SEO techniques that were expected to work in 2023:

1. Core Web Vitals and Page Experience: Google’s Core Web Vitals, which focus on page loading speed, interactivity, and visual stability, have become essential ranking factors. Ensure your website meets these requirements for a better user experience.

2. Mobile Optimization: Mobile-first indexing means Google primarily uses the mobile version of your site for ranking and indexing. Ensure your website is mobile-responsive and offers an excellent user experience on mobile devices.

3. Quality Content: High-quality, comprehensive, and authoritative content continues to be crucial for SEO. Create content that answers users’ questions and provides value. Invest in long-form content, but also keep an eye on user intent and provide concise answers when necessary.

4. Video SEO: Video content is growing in importance. Optimize your videos for search engines by providing accurate metadata, transcripts, and engaging thumbnails. Consider hosting videos on YouTube and embedding them on your site.

5. Voice Search Optimization: As voice-activated devices become more common, optimize your content for voice search by providing clear and concise answers to frequently asked questions.

6. Featured Snippets and Rich Results: Aim to optimize your content to appear in featured snippets, knowledge graphs, and rich results. This can increase visibility and click-through rates.

7. User Experience (UX) and Site Speed: A fast-loading, user-friendly website is crucial. Optimize images, leverage browser caching, and reduce unnecessary code. Ensure your website is easy to navigate and has a logical layout.

8. Schema Markup: Implement schema markup to provide search engines with structured data about your content. This can enhance the appearance of your listings in search results and improve click-through rates.

9. E-A-T (Expertise, Authoritativeness, Trustworthiness): Focus on building trust and credibility for your website. Showcase author expertise, display trust signals, and ensure your content is accurate and well-researched.

10. Local SEO: Optimize your website for local search by claiming and verifying your Google My Business listing, collecting reviews, and optimizing content for local keywords.

11. Backlink Quality over Quantity: Prioritize high-quality, relevant backlinks over a large number of low-quality links. Building relationships and earning backlinks from authoritative websites are essential.

12. Content Clusters and Topic Authority: Create content clusters around core topics. Establish your website as an authority in your niche by covering related subtopics comprehensively.

13. Secure Website (HTTPS): Ensure your website is secure with HTTPS. Google tends to favor secure sites in search results.

14. AI and Machine Learning: Stay updated with AI and machine learning advancements in SEO. These technologies are increasingly used for content optimization, analysis, and user behavior prediction.

15. Continuous Monitoring and Adaptation: Regularly monitor your website’s performance, rankings, and user behavior. Be ready to adapt your SEO strategy based on data and algorithm updates.

Remember that SEO is a long-term strategy, and it’s important to stay flexible and adapt to changes in search engine algorithms and user behavior. Keep an eye on industry trends and be prepared to adjust your tactics accordingly.