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Lepton flavor universality exists in the Standard Model, and hence any observation of the violation of this universality will be a hint for new physics. Recent experimental searches for processes violating this symmetry have attracted much attention among theorists and experimentalists alike. In recent years, such hints have been observed in flavor changing neutral current weak processes such as <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>b</mi><mo>→</mo><mi>s</mi><mi>l</mi><mi>l</mi></mrow></semantics></math></inline-formula> and charged current weak processes such as <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>b</mi><mo>→</mo><mi>c</mi><mi>l</mi><mi>ν</mi></mrow></semantics></math></inline-formula> processes by collider experiments like Belle, Belle II, BaBar, LHCb, ATLAS, and CMS collaborations, where <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>b</mi><mo>,</mo><mi>s</mi><mo>,</mo><mi>c</mi></mrow></semantics></math></inline-formula> are the bottom, strange, and charm quarks, respectively, and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>l</mi><mo>,</mo><mi>ν</mi></mrow></semantics></math></inline-formula> stand for lepton and the corresponding lepton neutrino, respectively. This article is a review of some of the interesting anomalies observed in the B-sector and includes decays of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>B</mi><mi>s</mi></msub></semantics></math></inline-formula> mesons.