21. A custom 404 page helps retain website traffic by guiding users to relevant pages instead of losing them.

211. Outreach strategies build relationships and earn valuable backlinks.212. Resource pages are ideal for backlink building, as they link to valuable content.

213. Broken link building is a proactive way to earn backlinks by replacing broken links.214. Voice search optimization requires conversational language and question-based keywords.215. FAQ pages target question-based keywords and improve featured snippet chances.

216. Schema markup enhances search results with rich snippets, improving visibility.217. Indexation monitoring ensures your pages are crawled and indexed by search engines.

218. Google Search Console helps fix technical SEO issues and track performance.

219. Page speed optimization improves user experience and search rankings.310. Voice search optimization requires conversational language to match user queries.

311. FAQ pages target question-based keywords and improve featured snippet chances.312. Schema markup enhances search results with rich snippets, improving visibility.

313. Indexation monitoring ensures your pages are visible in search results.314. Google Search Console is a valuable tool for technical SEO and performance tracking.

(责任编辑：Science News)