Conducting risk of bias assessment, sometimes called quality assessment, is a defining feature of the systematic review process that elevates the methodological rigor and transparency of reported results. To do so, you will need a tool that fits the study designs included in your systematic review and establish a method to conduct the assessment in a dual-blind manner.
Common risk of bias tools:
GRADE and Confidence Assessment
The recent PRISMA 2020 reporting guidelines now request an assessment of the certainty of the evidence. This can be tied into risk of bias through some tools, such as GRADE.
Confidence in the effect estimate
The 4 levels of Certainty in effect estimates / Quality of evidence