hi guys! I noticed a trend in some websites that do SEO they would use a keyword or a variation of it inside h1, h3 and h4 tags. I know this is great for seo! but they usually have two h2 tags, and from 5 to 10 h2 tags and a couple of h3 tags on each article, and every tag has a keyword or a long tail keyword in it. is this practice normal or safe for a long term website?