The paper discusses novel effects in superconductor-ferromagnet (S/F) structures, focusing on the triplet component of the superconducting condensate. This component is odd in frequency and even in momentum, making it insensitive to non-magnetic impurities. The triplet component can persist in ferromagnets even under strong exchange fields and can penetrate over long distances. The proximity effect in S/F structures leads to various phenomena, including enhanced Josephson currents, induced magnetic moments in superconductors, and periodic magnetic structures. Theoretical predictions are compared with experimental results. The proximity effect in S/N and S/F structures is analyzed, showing how superconductivity influences normal metals and ferromagnets. In S/N structures, the superconducting order parameter decays in the normal metal, while in S/F structures, the triplet component can penetrate ferromagnets. The paper discusses the odd triplet superconductivity in S/F structures, where the triplet component is not destroyed by the exchange field and can exist even with inhomogeneous magnetization. The long-range proximity effect is also discussed, where the superconducting condensate can influence the ferromagnet over large distances. The Josephson effect in S/F structures is analyzed, showing that the critical Josephson current can be enhanced due to the presence of the triplet component. The paper also discusses the inverse proximity effect, where a magnetic moment can be induced in a superconductor in contact with a ferromagnet. This effect is explained by the spin screening of the magnetic moment in the superconductor. The paper highlights the variety of non-trivial effects in S/F structures, including the suppression of superconductivity by ferromagnetism and the suppression of ferromagnetism by superconductivity. The study of these effects has led to new insights into the behavior of superconductors and ferromagnets in proximity. The paper concludes that the interaction between superconductivity and ferromagnetism leads to a wide range of interesting phenomena, and that further experimental research is needed to fully understand these effects.The paper discusses novel effects in superconductor-ferromagnet (S/F) structures, focusing on the triplet component of the superconducting condensate. This component is odd in frequency and even in momentum, making it insensitive to non-magnetic impurities. The triplet component can persist in ferromagnets even under strong exchange fields and can penetrate over long distances. The proximity effect in S/F structures leads to various phenomena, including enhanced Josephson currents, induced magnetic moments in superconductors, and periodic magnetic structures. Theoretical predictions are compared with experimental results. The proximity effect in S/N and S/F structures is analyzed, showing how superconductivity influences normal metals and ferromagnets. In S/N structures, the superconducting order parameter decays in the normal metal, while in S/F structures, the triplet component can penetrate ferromagnets. The paper discusses the odd triplet superconductivity in S/F structures, where the triplet component is not destroyed by the exchange field and can exist even with inhomogeneous magnetization. The long-range proximity effect is also discussed, where the superconducting condensate can influence the ferromagnet over large distances. The Josephson effect in S/F structures is analyzed, showing that the critical Josephson current can be enhanced due to the presence of the triplet component. The paper also discusses the inverse proximity effect, where a magnetic moment can be induced in a superconductor in contact with a ferromagnet. This effect is explained by the spin screening of the magnetic moment in the superconductor. The paper highlights the variety of non-trivial effects in S/F structures, including the suppression of superconductivity by ferromagnetism and the suppression of ferromagnetism by superconductivity. The study of these effects has led to new insights into the behavior of superconductors and ferromagnets in proximity. The paper concludes that the interaction between superconductivity and ferromagnetism leads to a wide range of interesting phenomena, and that further experimental research is needed to fully understand these effects.