If a blog has ton of comments then will it's SEO get effected??

[jahnvi arora]

Well, it all depends on the quality of the comment if the comments on your site are related to your niche then it will add more value and the reader's interest to your site. Here we can say that comments quality wins over the quantity. As far as the SERP results are concerned, if your site is heavily commented then it takes more time to load your site. It may increase website loading time.