SEO companies should not give a shore-shot guarantee for first page ranking for a website, it’s not legitimate as google also warns against making such types of promises. What they can guarantee to deliver is like.
Growth in traffic of the website- they can guarantee this in terms of figure in range or percentage as per their planning, target and calculation.
Improved crawlability- SEO company can also promise for improvement in crawlability.
Keyword movements- SEO company can also offer improvement in ranking of the keywords, but cannot offer first page ranking.
