English to French Marketing Advertising / Public Relations

Hello,
Please, I want to know the ideal idiomatic translation of (act as bites)
These skills involve the use of certain keywords and expressions that act as bites, attracting the different search engines on the web. Such search engine optimization secrets are only known to professional copywriters.
I have translated as follows : (what do you think about this translation)

Ces compétences comprennent l'utilisation de certains mots clés et expressions qui agissent comme (des hameçons) pour attirer les différents moteurs de recherche sur le Web. les secrets de l' optimisation du moteur de recherche sont connus que par les rédacteurs publicitaires professionnels.