OnCrawl is fabulous overall but in particular I have found their internal linking reports super helpful. I was able to identify some internal link weaknesses on a large eCommerce site fairly quickly and easily and set a strategy for improvement based on the findings.

One of the best things I like about Oncrawl is it's Crawl Budget Report. I can identify what all pages of my site have been crawled by Google Bot. What is the overall crawl ratio, what percentage of pages in structure not crawled, unique pages crawled, bot hits, newly pages crawled pages, and crawl frequency per day.

The log data available gives more insight into a website on how it is performing and what the issues that need to be fixed