Make sure the content you want Googlebot to crawl, index, and ultimately rank is in the first 15MB of that page.
Google has updated its Googlebot help document to specify that Googlebot it will crawl up to the first 15 MB of the page and then stop.
So if you want to make sure Google ranks your page appropriately, make sure Googlebot can crawl and index that part of the page in the first 15MB.
In the Googlebot help document, Google has added this section which says the following:
Googlebot can crawl the first 15 MB of content in a compatible HTML file or text file.
After the first 15 MB of the fileGooglebot stops crawling and only considers the first 15MB of content for indexing.
Other trackers may have different limits.
In general, you probably want to keep your pages light enough for users and search engine crawlers. But here, Google is very clear about how much Googlebot will consume from your page.
A good way to test this is to use the URL inspector tool at the top of your Google search console and see what parts of the page Google displays and sees in the debugging tool.