An SEO glossary of terms every marketer should know in 2026
A practical, current glossary covering the essential SEO terminology every marketer should be comfortable with, from foundational concepts to 2026-specific terms.
6 min read
Merging two websites after a company merger or acquisition combines the technical complexity of a full site migration with an additional layer of decisions about which brand, content and domain ultimately survives the combination.
Deciding which domain survives
Generally, the domain with stronger existing authority, more established rankings, and greater strategic importance to the combined business should be retained as the primary domain, with the other domain's content and authority consolidated into it through redirects.
Auditing content overlap first
Before deciding on redirects, map both sites' content for genuine topical overlap — pages from each site that would compete for the same search terms if both remained live should be consolidated into one strong version rather than left to compete against each other, similar to the cannibalisation problem but at merger scale.
- Identify genuinely overlapping content between the two sites' existing pages.
- Determine which version is stronger (traffic, backlinks, content quality) for each overlapping topic.
- Redirect the weaker overlapping page to the stronger surviving version.
- For genuinely unique content on the retiring domain, redirect to the most relevant equivalent page on the surviving domain.
A merger done well combines two authorities into one stronger one. A merger done carelessly can actually reduce combined visibility below what either site had achieved separately.
Handling brand transition
If the merger involves a genuine rebrand, plan the transition timeline carefully, maintaining clear communication (including on the retiring site, if it remains briefly accessible during transition) about the change, and update all external profiles, citations and directory listings consistently.
Post-merger monitoring
Monitor combined organic performance closely for at least a full quarter after the merger completes, since Google needs time to fully process the consolidation — the same patience and monitoring discipline covered in our site migration checklist applies directly here.
Frequently asked questions
Should every page from the retiring domain redirect somewhere?
Ideally yes, to a genuinely relevant equivalent — redirecting everything to the surviving site's homepage, rather than specific relevant pages, wastes most of the potential consolidation value.
How long does a merger-related SEO transition typically take to stabilise?
Similar to a standard migration, several weeks to a few months for most of the transition to settle, though very large or complex mergers can take longer.
Can combined SEO value ever exceed what the two sites had separately?
Yes, this is the ideal outcome of a well-executed merger — consolidated authority and eliminated internal competition for the same terms can genuinely produce a stronger combined result than either site achieved alone.
If you are planning a website merger following a business combination, contact our team for a redirect strategy.
The takeaway
Map both sites' content for genuine overlap before deciding on a redirect strategy — merging content that genuinely competes for the same terms, rather than redirecting everything indiscriminately, preserves the most combined value.
Written by Fibvo — Bengaluru and Erode, India — working with clients in other time zones. Questions, or think we have it wrong? Tell us.
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