In Lumar, you can see which metrics have changed from crawl to crawl in the Resource Detail View. From any report in Lumar, click on a URL or opportunity link and then choose 'Changed Metrics' in the left-hand navigation.
In the resulting view, you can see all the metrics that have changed from crawl to crawl. You can also select a different crawl using the dropdown above the right-hand column if required. There's also a search box you can use to find a specific metric.
For Technical SEO projects, you can also see a number of pre-built reports for the following key metrics:
- Availability:
- Pages with Changed Status Code
- Indexability > Canonicalization:
- Pages with Changed Canonical URLs
- Discoverability:
- Pages with Changed Level (in the Internal Linking subcategory)
- Pages with Changed Redirected To URLs (in the Redirections subcategory)
- Pages with Changed Hreflang Combinations (in the Internationalization subcategory)
- Rankability > Page Content:
- Pages with Changed Title
- Pages with Changed Description
- Pages with Changed H1 Tags
For each of these reports, you'll see a trend chart showing the difference over time. In the report table you'll see the current value, with the value from the previous crawl struck out.
To protect against false positive changes caused by status codes like 3xx, 4xx and 5xx being reported, the Changed Title, Description and H1 reports will only populate if URLs received a 200 status code in the recent crawl and the one it’s being compared to. Similarly, the Changed Levels report will only populate if URLs have a level within the crawl and the one it’s being compared to, to avoid orphaned URLs being included within the data.