"Catchphrase stuffing" alludes to the act of stacking a site page with watchwords or numbers trying to control a site's positioning in Google query items. Frequently these watchwords show up in a rundown or gathering, or outside the realm of relevance (not as characteristic writing).

keyword stuffing is black hat SEO technique in which you insert the keyword in content or in meta tags many times to increase ranking for that particular keyword

Keyword stuffing is known as an illegal search engine optimization technique that involves adding an excessive amount of keywords into the HTML or tags of a webpage to bring more traffic to a website. its a one type of black hat SEO