Will infinite scroll will be a problem for search engine optimization (SEO)?
Infinite scroll would be a problem if all of siteâ€™s content is
accessible only from such pages, then search crawlers wouldnâ€™t be able
to index your content. But.. except on front page, all posts and pages
are accessible through: category pages (you can switch grid layout for
categories globally or only for selected categories), tag pages and date
Letâ€™s step away from this theme for a moment. Here problem could be that a lot of your siteâ€™s pages with the similar (or even same content) could be indexed (remember that each post is on a category/tag page for each category/tag that it belongs to). And that lowers the search rank of all of those pages. Thatâ€™s why popular SEO plugins (like SEO by Yoast) offer an option, in their settings, to prevent search engines to index your category and tag pages.
So your posts should be indexed well. Furthermore, if you plan to optimize your site youâ€™ll probably generate an xml map of your site, often thatâ€™s also a feature of a popular SEO plugins, and register it at Google Webmasters Tools service (and similar service for Bing and any other search engines). Basically, xml map contains URLs to all of your siteâ€™s content and by submitting it to Webmaster service your telling crawlers of that search engine to index all of those links. Also, using those services youâ€™ll be able to see which of your siteâ€™s pages are indexed and so on.