SEO analyser for articles and advertorials

How the SEO score is calculated

The score is not a black box. Each rule has a number of points, shown next to it, and the final score is the percentage of points earned out of the total possible. The rules cover things you can fix straight away: the keyword in the headline, in the first paragraph and in a subheading, keyword density, text length, the share of long sentences, oversized paragraphs, the number of subheadings and links, varied anchor text and the use of linking words.

If you leave the keyword empty, the rules that depend on it are skipped and the score is calculated from the rest. For a complete picture, always fill it in.

Keyword density, without obsessing

Density is the number of exact occurrences of the phrase divided by the total number of words. The tool uses 0.5–2.5% as a guide, but there is no magic value. A text that forces the same phrase in again and again sounds artificial and loses the reader’s trust. That is why we also show occurrences “with forms”: simple inflected variants such as plurals and -ing or -ed endings, which are perfectly natural in English.

The readability index

For English we use the Flesch Reading Ease score. It combines the average number of words per sentence with the average number of syllables per word, and returns a number that is usually between 0 and 100: the higher it is, the easier the text. As a guide, 60–70 is plain English, 50–59 is fairly difficult and below 30 is very difficult. Here, 50 or above earns full points, 35–49 earns partial points and anything lower earns none. Syllables are counted by a simple rule of thumb, so treat the figure as indicative, not as a standard. Short sentences and everyday words make a text easier to read, especially on a phone. The Romanian version of the tool uses the LIX index.

What the tool does not check

• the quality of the information and the accuracy of the facts;
• images and their alt text;
• the search intent behind the keyword;
• compliance with the publishing rules (for that, use the compliance checker).

Once the text looks good, you can test the headline and description in the Google SERP preview.