First of all do not get thrilled by ranking positions, use success-driven metrics shared by me to analyse performance of SEO team/agency.
The KPI given below is for established to fairly new sites
Sessions: Increased by min. 5% MoM
Conversions: Increase by min. 5% to 10% MoM (cap of overall 75% to 100% YoY)
Indexed pages: Number of pages appearing in top 100 rise by 20% next quarter
Domain authority: Increased to min. 15% after 6 to 9 months (DA 30 currently reach DA 35)
For new sites: Minimum 15 unique keywords should showcase ‘brand + keyterms’ as referral queries after 4 months
Contribution: 90% increase in *generic terms, 10% in total brand terms after 1 year (1000 generic to 1900 generic terms, 200 brand to 220 brand terms YoY)
Backlinks breakup: 80% brand and domain(.com), 10% generic and 10% lateral terms after 6 months
Indexed pages: 150% YoY basis (1000 pages reach to 1500 pages)
SEO Revenue: doubled for YoY
* For 2 phrase/3 phrase generic terms
SEO amongst top 3 always for ‘Assisted conversions’.