The Technical SEO & Site Performance Checklist: How to Brief an Agency for Results That Scale

You are about to brief an SEO agency on a technical site migration to Google Cloud’s network edge, and you need a checklist that separates signal from noise. Technical SEO is not a set-it-and-forget-it task; it is a continuous engineering discipline that governs how search engines discover, render, and rank your content. When your infrastructure moves to a global edge network, the variables multiply: latency drops, crawl budgets shift, and previously hidden duplicate content issues can surface. This article provides a step-by-step operational checklist for briefing an agency on technical SEO and site performance optimization, with risk-aware guidance on what can go wrong—and how to prevent it.

1. Define the Scope of the Technical SEO Audit

Before any work begins, you must establish what a thorough technical audit covers. A standard audit should include an analysis of crawlability, indexation status, site architecture, internal linking, and server configuration. When your site is hosted on a distributed edge network, the audit must also evaluate how regional edge nodes affect crawl patterns and cache behavior. The agency should examine your `robots.txt` file for accidental blocking of critical resources, review your XML sitemap for inclusion of only canonical pages, and check for soft 404s or redirect chains that waste crawl budget.

Key deliverables from the audit phase:

• Crawl error report with prioritized fixes (4xx, 5xx, redirect loops)
• Indexation coverage analysis (pages indexed vs. pages submitted)
• Server response time breakdown per geographic region
• Duplicate content detection (URL parameters, www vs. non-www, trailing slashes)
• Core Web Vitals baseline (LCP, CLS, INP) measured from multiple edge locations

2. Crawl Budget Management on a Global Edge Network

Crawl budget is the number of URLs a search engine will crawl on your site within a given timeframe. On a global edge network, Googlebot may see different response times from different edge nodes, which can inflate or deflate your effective crawl rate. If your edge nodes are misconfigured—for example, serving stale cached pages to Googlebot while real users get fresh content—the search engine may waste crawl budget on low-value URLs or miss important new pages entirely.

How to brief the agency on crawl budget optimization:

• Ensure that your `robots.txt` does not block JavaScript or CSS files that are essential for rendering.
• Set appropriate cache-control headers for static assets but avoid caching dynamic pages that change frequently.
• Use the URL Inspection Tool in Google Search Console to verify that each edge node returns the correct canonical URL and response code.
• Monitor the Crawl Stats report weekly during the first month after migration to detect anomalies.

3. Core Web Vitals: From Measurement to Engineering Fix

Core Web Vitals are user experience metrics that are also ranking signals. The three metrics—Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and Interaction to Next Paint (INP)—must be measured from the perspective of real users, not just from a single datacenter. On a global edge network, LCP can vary dramatically depending on which edge node serves the content. For example, a user in one region might have a noticeably different LCP than a user in another, even though both are served from the same origin.

Action items for the agency:

• Implement real-user monitoring (RUM) using the `PerformanceObserver` API or a third-party RUM service.
• Optimize image delivery: serve WebP or AVIF formats, use responsive image sizes, and lazy-load below-the-fold images.
• Minimize render-blocking resources by inlining critical CSS and deferring non-critical JavaScript.
• For CLS, ensure that all embedded elements (ads, images, iframes) have explicit width and height attributes.
• For INP, audit third-party scripts (analytics, chatbots, widgets) that may block the main thread.

4. On-Page Optimization and Intent Mapping

On-page optimization goes beyond keyword stuffing. Modern on-page SEO requires mapping each page to a specific search intent—informational, navigational, commercial, or transactional. The agency should conduct keyword research using tools like Ahrefs, Semrush, or Google Keyword Planner, then group keywords by intent to create a content strategy that aligns with user expectations.

Checklist for briefing on-page optimization:

• Title tags: unique, under 60 characters, include primary keyword near the beginning.
• Meta descriptions: compelling, under 160 characters, include a call to action.
• Header structure: one H1 per page, logical H2/H3 hierarchy.
• Internal linking: link to relevant pillar pages using descriptive anchor text.
• Schema markup: implement appropriate structured data (Article, Product, FAQ, HowTo) for rich snippets.
• Canonical tags: every page must have a self-referencing canonical unless it is a duplicate or paginated version.

5. Link Building: Strategy vs. Risk

Link building remains one of the most effective off-page SEO tactics, but it is also the most dangerous when done poorly. The agency should present a link building campaign that focuses on earning editorial backlinks from authoritative domains in your niche. Avoid any agency that promises a specific number of links per month or guarantees a certain Domain Authority increase. Black-hat tactics—such as private blog networks (PBNs), paid links, or automated link exchanges—can trigger a manual penalty that takes months to recover from.

How to brief a safe link building campaign:

• Define your target audience and the types of sites they trust (industry publications, .edu resources, government databases).
• Require the agency to provide a backlink profile audit before starting any outreach.
• Set a maximum acceptable spam score based on a reputable metric (e.g., Moz Spam Score) for any new link.
• Insist on a monthly report that includes the referring domain’s Trust Flow, Citation Flow, and topical relevance.
• Prohibit any use of exact-match anchor text for money keywords; anchor text should be branded, naked URL, or generic.

6. Monitoring, Reporting, and Continuous Optimization

Technical SEO is not a one-time project. After the initial audit and fixes, the agency should set up a monitoring cadence that includes weekly crawl reports, bi-weekly Core Web Vitals checks, and monthly backlink profile reviews. The reporting should compare metrics against the baseline established in the audit phase, not against industry averages. If the agency reports “organic traffic increased by 50%” without controlling for seasonality, algorithm updates, or paid campaigns, ask for a segmented view that isolates organic search from other channels.

Essential reporting metrics:

• Organic sessions and conversions by landing page
• Average position for target keywords (by intent group)
• Indexed pages vs. submitted pages
• Core Web Vitals pass rate (good, needs improvement, poor)
• Crawl stats: total crawl requests, average response time, top crawl errors
• Backlink profile: new referring domains, lost links, spam score changes

7. Common Pitfalls and How to Avoid Them

Even with a clear brief, things can go wrong. Here are the most frequent mistakes agencies make when optimizing sites on a global edge network:

• Wrong redirects: Using 302 instead of 301 for permanent moves, or implementing redirect chains that increase latency. Always use server-side 301 redirects and keep chains to a maximum of three hops.
• Ignoring mobile-first indexing: Google predominantly uses the mobile version of a page for indexing and ranking. If your mobile site has less content or slower load times than the desktop version, you will lose rankings.
• Over-optimizing anchor text: Internal links with exact-match anchor text across dozens of pages can look manipulative. Vary anchor text between branded, partial-match, and generic phrases.
• Neglecting log file analysis: Google Search Console data is sampled. For a complete picture of crawl behavior, request server log files and analyze them with a tool like Screaming Frog Log File Analyzer.

Summary Checklist for Briefing an SEO Agency

1. Audit scope: Require a full technical audit covering crawlability, indexation, server response, duplicate content, and Core Web Vitals.
2. Crawl budget: Ask for a crawl budget analysis specific to your edge network configuration.
3. On-page optimization: Provide a keyword list with intent mapping and demand unique title tags and meta descriptions per page.
4. Link building: Set clear boundaries on acceptable tactics and require a backlink profile audit before outreach.
5. Core Web Vitals: Insist on RUM data and a timeline for fixing any pages in the “poor” category.
6. Reporting: Define metrics, frequency, and segmentation before the engagement starts.
7. Risk management: Prohibit black-hat tactics, require log file analysis, and mandate mobile-first testing.

By following this checklist, you will brief your agency with precision, reduce the risk of costly mistakes, and set a foundation for technical SEO that scales with your infrastructure. For further reading on site health audits, explore our guide on technical SEO audits and our deep dive into Core Web Vitals optimization.